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difluorophosphate

{{Short description|none}}

{{Chembox

| Verifiedfields = changed

| verifiedrevid =

| ImageFile = Difluorophosphate ion.png

| ImageSize = 175

| ImageAlt = Structure of difluorophosphate ion

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| ImageFile1_Ref = {{chemboximage|correct|??}}

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| ImageFileL1 = Difluorophosphate-3D-balls.png

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| ImageSizeL1 = 130

| ImageNameL1 = Ball-and-stick model of the difluorophosphate ion

| ImageFileR1 = Difluorophosphate-3D-vdW.png

| ImageFileR1_Ref = {{chemboximage|correct|??}}

| ImageSizeR1 = 130

| ImageNameR1 = Spacefill model of difluorophosphate

| SystematicName = Difluorophosphate{{cite book|last1=Toy|first1=Arthur D. F.|title=The Chemistry of Phosphorus |series=Pergamon Texts in Inorganic Chemistry |volume=3|date=22 Oct 2013|publisher=Pergamon Press|pages=536–537|url=https://books.google.com/books?id=4Ub9BAAAQBAJ&pg=PA536|access-date=19 June 2015|isbn=9781483147413}}

|Section1={{Chembox Identifiers

| IUPHAR_ligand =

| CASNo = 7238-93-9

| CASNo_Ref =

| PubChem = 5250558

| ChemSpiderID = 4417671

| InChI = 1/F2HO2P/c1-5(2,3)4/h(H,3,4)/p-1

| InChIKey = DGTVXEHQMSJRPE-REWHXWOFAH

| StdInChI = 1S/F2HO2P/c1-5(2,3)4/h(H,3,4)/p-1

| StdInChIKey = DGTVXEHQMSJRPE-UHFFFAOYSA-M

| DrugBank_Ref =

| DrugBank =

| MeSHName =

| ChEBI_Ref =

| ChEBI =

| ChEMBL =

| ChEMBL_Ref =

| Gmelin =

| SMILES = [O-]P(=O)(F)F

}}

|Section2={{Chembox Properties

| Formula = {{chem2|PO2F2−}}

| MolarMass = 100.97 g mol−1

}}

| Section3 = {{Chembox Structure

| Coordination = Tetracoordinated at phosphorus atom

| MolShape = Tetrahedral at phosphorus atom

}}

}}

Difluorophosphate or difluorodioxophosphate or phosphorodifluoridate is an anion with formula {{chem2|PO2F2−}}. It has a single negative charge and resembles perchlorate ({{chem2|ClO4−}}) and monofluorosulfonate ({{chem2|SO3F−}}) in shape and compounds. These ions are isoelectronic, along with tetrafluoroaluminate, phosphate, orthosilicate, and sulfate. It forms a series of compounds. The ion is toxic to mammals as it causes blockage to iodine uptake in the thyroid. However it is degraded in the body over several hours.

Compounds containing difluorophosphate may have it as a simple uninegative ion, it may function as a difluorophosphato ligand where it is covalently bound to one or two metal atoms, or go on to form a networked solid.{{cite journal|last1=Schulz|first1=Christoph|last2=Eiden|first2=Philipp|last3=Klose|first3=Petra|last4=Ermantraut|first4=Andreas|last5=Schmidt|first5=Michael|last6=Garsuch|first6=Arnd|last7=Krossing|first7=Ingo|title=Homoleptic borates and aluminates containing the difluorophosphato ligand – [M(O2PF2)x]y− – synthesis and characterization|journal=Dalton Trans.|date=2015|volume=44|issue=15|pages=7048–7057|doi=10.1039/c5dt00469a|pmid=25785817|doi-access=free}} It may be covalently bound to a non metal or an organic moiety to make an ester or an amide.

Formation

Ammonium difluorophosphate ({{chem2|[NH4]PO2F2}}) is formed from treating phosphorus pentoxide with ammonium fluoride.{{cite journal|last1=Anbar|first1=M.|last2=Guttmann|first2=S.|last3=Lewitus|first3=Z.|title=Effect of Monofluorosulphonate, Difluorophosphate and Fluoroborate Ions on the Iodine Uptake of the Thyroid Gland|journal=Nature|date=30 May 1959|volume=183|issue=4674|pages=1517–1518|doi=10.1038/1831517a0|pmid=13666792|bibcode=1959Natur.183.1517A|s2cid=4291858}} This was how the ion was first made by its discoverer, Willy Lange, in 1929.{{cite journal|last1=Lange|first1=Willy|title=Über die Difluorphosphorsäure und ihre der Perchlorsäure ähnliche Salzbildung|trans-title=On difluorophosphoric acid and its perchlorate-like salt formation|journal=Berichte der Deutschen Chemischen Gesellschaft (A and B Series) |date=3 April 1929|volume=62|issue=4|pages=786–792|doi=10.1002/cber.19290620408}}{{cite journal|last1=Vast|first1=P.|last2=Semmoud|first2=A.|last3=Addou|first3=A.|last4=Palavit|first4=G.|title=Étude méthodologique de la synthèse des difluorodioxophosphates métalliques à partir de l'oxyde difluorure de phosphoryle|trans-title=Methodical study of the synthesis of metal difluorodioxophosphates from phosphoryl difluoride oxide|journal=Journal of Fluorine Chemistry|date=March 1988|volume=38|issue=3|pages=297–302|doi=10.1016/S0022-1139(00)81065-9}}

Alkali metal chlorides can react with dry difluorophosphoric acid to form alkali metal salts.{{cite journal|last1=Thompson|first1=R.C.|last2=Reed|first2=W.|title=Preparation and infrared spectra of alkali metal difluorophosphates|journal=Inorganic and Nuclear Chemistry Letters|date=July 1969|volume=5|issue=7|pages=581–585|doi=10.1016/0020-1650(69)80034-6}}

:{{chem2|NaCl + HPO2F2 → NaPO2F2 + HCl(g)}}

Fluorination of dichlorophosphates can produce difluorophosphates.{{cite journal|last1=Weidlein|first1=J.|title=Darstellung, Eigenschaften und IR-Spektren von OTi(O2PCl2)2, Fe(O2PF2)3 und In(O2PF2)3|trans-title=Description, properties and IR spectra of...|journal=Zeitschrift für anorganische und allgemeine Chemie|date=April 1968|volume=358|issue=1–2|pages=13–20|doi=10.1002/zaac.19683580103}} Another method is fluorination of phosphates or polyphosphates.

Trimethylsilyl difluorophosphate ({{chem2|(CH3)3Si\sO\sP(\dO)F2}}) reacts with metal chlorides to give difluorophosphates.{{cite journal|last1=Shihada|first1=Abdel-Fattah|last2=Mohammed|first2=Abdulalah T.|title=Zur Reaktion von Trimethylsilyl-difluorophosphat, Trimethylsilyl-dimethylphosphinat und Difluorophosphorsäureanhydrid mit TiCl4 bzw. SbCl5 |trans-title=On the Reactions of Trimethylsilyl Difluorophosphate, Trimethylsilyl Dimethylphosphinate and Difluorophosphoric Acid Anhydride with TiCl4 and SbCl5|journal=Zeitschrift für Naturforschung B|date=1 January 1980|volume=35|issue=1|pages=60–63|doi=10.1515/znb-1980-0114|s2cid=96302051|doi-access=free}}

The anhydride of difluorophosphoric acid ({{chem2|HPO2F2}}), phosphoryl difluoride oxide ({{chem2|P2O3F4}}) reacts with oxides such as uranium trioxide to yield difuorophosphates.{{cite journal|last1=Vast|first1=P.|last2=Semmoud|first2=A.|title=Préparation de nouveaux difluorodioxophosphates à partir de l'oxyde de difluorure de phosphoryle. Partie V. Réactions sur le trioxyde d'uranium|trans-title=Preparation of new difluorodioxophosphates from phosphoryl difluorideoxide. Part V. Reactions with uranium dioxide|journal=Journal of Fluorine Chemistry|date=January 1985|volume=27|issue=1|pages=47–52|doi=10.1016/S0022-1139(00)80896-9}} Phosphoryl difluoride oxide also reacts with alkali metal fluorides to yield difluorophosphates.{{cite journal|last1=Addou|first1=A.|last2=Vast|first2=P.|last3=Legrand|first3=P.|title=Champ de forces de symetrie locale des composés oxyfluorés du phosphore(V). I. Les difluorodioxophosphates (DFP) alcalins|trans-title=Local symmetry force-field of oxyfluorine compounds of phosphorus(V). I. Alkali difluorodioxophosphates (DFP)|journal=Spectrochimica Acta Part A: Molecular Spectroscopy|date=January 1982|volume=38|issue=7|pages=785–790|doi=10.1016/0584-8539(82)80068-8|bibcode=1982AcSpA..38..785A}}

Properties

The difluorophosphate ion in ammonium difluorophosphate and potassium difluorophosphate has these interatomic dimensions:{{cite journal|last1=Harrison|first1=R. W.|last2=Trotter|first2=James|title=Structure of ammonium difluorophosphate|journal=Journal of the Chemical Society A: Inorganic, Physical, Theoretical|date=1969|pages=1783|doi=10.1039/J19690001783}}

{{Table|class="wikitable"}}

! Difluorophosphate salt !! P–O length !! P–F length !! O–P–O angle !! F–P–O angle !! F–P–F angle

Ammonium difluorophosphate

| 1.457 Å

| 1.541 Å

| 118.7°

| 109.4°

| 98.6°

Potassium difluorophosphate

| 1.470 Å

| 1.575 Å

| 122.4°

| 108.6°

| 97.1°

Hydrogen bonding from ammonium ion to oxygen atoms causes a change to the difluorophosphate ion in the ammonium salt.

On heating the salts that are not of alkali metals or alkaline earth metals, difluorophosphates decompose firstly by giving off phosphoryl fluoride forming a monofluorophosphate ({{chem2|PO3F(2−)}}) compound, and then this in turn decomposes to an orthophosphate {{chem2|PO4(3−)}} compound.{{cite journal|last1=Vast|first1=P.|last2=Semmoud|first2=A.|title=Comportement thermique du difluorodioxophosphate ferreux|trans-title=Thermal behaviour of ferrous difluorodioxophosphate|journal=Journal of Thermal Analysis|date=June 1994|volume=41|issue=6|pages=1489–1493|doi=10.1007/bf02549945|s2cid=95079191}}{{cite journal|last1=Vast|first1=P.|last2=Semmoud|first2=A.|last3=Palavit|first3=G.|title=Préparation de l'acide monofluorotrioxophosphorique H2PO3F à partir de l'acide difluorodioxophosphorique HPO2F2|trans-title=Preparation of monofluorotrioxophosphoricacid H2PO3F from difluorodioxophosphoric acid HPO2F2|journal=Journal of Fluorine Chemistry|date=December 1986|volume=34|issue=2|pages=229–232|doi=10.1016/s0022-1139(00)85072-1}}

Difluorophosphate salts are normally soluble and stable in water. However, in acidic or alkaline conditions they can be hydrolyzed to monofluorophosphates and hydrofluoric acid. The caesium and potassium salts are the least soluble.

Irradiating potassium difluorophosphate with gamma rays can make the free radicals {{chem2|•PO2F−}}, {{chem2|•PO3F−}} and {{chem2|•PO2F2}}.{{cite journal|last1=Begum|first1=Afrozi|last2=Subramanian|first2=S.|last3=Symons|first3=M. C. R.|title=Unstable intermediates. Part LXVIII. Electron spin resonance studies of the radicals O3PF− and O2PF2|journal=Journal of the Chemical Society A: Inorganic, Physical, Theoretical|date=1970|pages=1323|doi=10.1039/J19700001323}}{{cite journal|last1=Begum|first1=A.|last2=Subramanian|first2=S.|last3=Symons|first3=M. C. R.|title=Unstable intermediates. Part LXXXVI. Electron spin resonance studies of the effect of γ-rays on potassium difluorophosphate: the radical PO2F?|journal=Journal of the Chemical Society A: Inorganic, Physical, Theoretical|date=1971|pages=700–702|doi=10.1039/J19710000700}}

Compounds

class="wikitable"

!Formula

!Name

!Structure

!Infrared spectrum

!Melting point

!Comments

!Reference

{{chem2|LiPO2F2}}

| Lithium difluorophosphate

|

|

| 360 °C

|

|

{{chem2|Be(PO2F2)2}}

| Beryllium difluorophosphate

|

|

|>400 °C {{abbr|d|decomposes}}

| prepared from beryllium chloride and acid

|{{cite thesis|last1=Tan|first1=Thiam Hock|title=Preparation and Properties of Metal Difluorophosphates|date=August 1970|url=https://circle.ubc.ca/bitstream/id/123879/UBC_1970_A6_7%20T35.pdf|publisher=University of British Columbia|url-status=dead|archive-url=https://web.archive.org/web/20160304035919/https://open.library.ubc.ca/media/download/pdf/831/1.0059945/1|archive-date=2016-03-04 }}

{{chem2|CH3CH2\sO\sP(\dO)F2}}

| Ethyl difluorophosphate

|

|

|

|

|

{{chem2|[NH4]+PO2F2−}}

| Ammonium difluorophosphate

| orthorhombic: a = 8.13 Å, b = 6.43 Å, c = 7·86 Å, Z = 4 space group Pnma

| P–F stretching 842 and 860 cm−1; P–O stretching 1138 and 1292 cm−1

| 213 °C

|

|

{{chem2|[NO2]+PO2F2−}}

| Nitronium difluorophosphate

|

| 515, 530, 550, 560, 575, 845, 880, 1145, 1300, 2390, 3760 cm−1

|

| nitronium formed from anhydride and {{chem2|N2O5}}

|{{cite journal|last1=Addou|first1=A.|last2=Vast|first2=P.|title=Préparation de nouveaux difluorodioxophosphates à partir de l'oxyde de difluororure de phosphoryle. Partie I. Réactions sur les oxydes d'azote|trans-title=Preparation of new difluorodioxophosphates from phosphoryl difluoride oxide. Part I. Reactions with nitrogen oxides|journal=Journal of Fluorine Chemistry|date=August 1979|volume=14|issue=2|pages=163–169|doi=10.1016/S0022-1139(00)82884-5}}

{{chem2|[NO]+PO2F2−}}

| Nitrosonium difluorophosphate

|

| 500, 840, 880, 1130, 1272, 1315, 2278 cm−1

|

| nitrosonium formed from anhydride and {{chem2|N2O3}}

|

{{chem2|NaPO2F2}}

| Sodium difluorophosphate

|

|

| 210 °C

|

|

{{chem2|Mg(PO2F2)2}}

| Magnesium difluorophosphate

|

|

| 200 °C

|

|

{{chem2|[NH4]+Mg(2+)(PO2F2−)3}}

| Ammonium magnesium difluorophosphate

|Cmcm a=5.411 b=15.20 c=12.68

|

|

|

|{{Cite journal |last1=Zhang |first1=Wenyao |last2=Jin |first2=Wenqi |last3=Cheng |first3=Meng |last4=Zhang |first4=Ruonan |last5=Yang |first5=Zhihua |last6=Pan |first6=Shilie |date=2021 |title=From centrosymmetric to noncentrosymmetric: effect of the cation on the crystal structures and birefringence values of (NH 4 ) n−2 AE(PO 2 F 2 ) n (AE = Mg, Sr and Ba; n = 2, 3 and 4) |url=http://xlink.rsc.org/?DOI=D1DT00698C |journal=Dalton Transactions |language=en |volume=50 |issue=29 |pages=10206–10213 |doi=10.1039/D1DT00698C |pmid=34231608 |s2cid=235758275 |issn=1477-9226}}

{{chem2|Al(PO2F2)3}}

| Aluminium difluorophosphate

| polymeric

| 505, 541, 582, 642, 918, 971, 1200, 1290 cm−1 (with 355 cm−1 impurity)

|

| formed from Triethylaluminium and acid; colourless insoluble powder

|

{{chem2|Si(\sO\sP(\dO)F2)4}}

| Silicon(IV) difluorophosphate

|

|

|

| formed from silicon tetrachloride and anhydride

|{{cite journal|last1=Roesky|first1=Herbert W.|title=Über Reaktionen mit Pyrophosphoryltetrafluorid|trans-title=On Reactions with pyrophosphoryl tetrafluoride|journal=Chemische Berichte|date=July 1967|volume=100|issue=7|pages=2147–2150|doi=10.1002/cber.19671000706}}

{{chem2|(CH3)3Si\sO\sP(\dO)F2}}

| Trimethylsilyl difluorophosphate

|

|

|

| formed from anhydride and {{chem2|[(CH3)3Si]2O}}

|

{{chem2|KPO2F2}}

| Potassium difluorophosphate

| orthorhombic: a = 8.03 Å, b = 6.205 Å, c = 7.633 Å, Z = 4, V=380.9 Å3, density = 2.44 g/cm3

| 510, 525, 570, 835, 880, 1145, 1320, 1340 cm−1

| 263 °C

| colourless elongated prisms

|{{cite journal|last1=Trotter|first1=James|last2=Whitlow|first2=S. H.|title=The structures of caesium and rubidium difluorophosphates|journal=Journal of the Chemical Society A: Inorganic, Physical, Theoretical|date=1967|pages=1383–1386|doi=10.1039/J19670001383}}{{cite journal|last1=Harrison|first1=R. W.|last2=Thompson|first2=R. C.|last3=Trotter|first3=James|title=The structure of potassium difluorophosphate|journal=Journal of the Chemical Society A: Inorganic, Physical, Theoretical|date=1966|pages=1775|doi=10.1039/J19660001775}}

{{chem2|(K+)4(PO2F2−)2(S2O7(2−))}}

| Tetrapotassium difluorophosphate pyrosulfate

|C2/c: a = 13.00 Å, b = 7.543 Å, c = 19.01 Å, β = 130.07°, Z = 4

|

|

|

|{{Cite journal|last1=Zhang|first1=Wenyao|last2=Jin|first2=Wenqi|last3=Yang|first3=Zhihua|last4=Pan|first4=Shilie|date=2020|title=K4(PO2F2)2(S2O7): first fluorooxophosphorsulfate with mixed-anion [S2O7]2− and [PO2F2]− groups|url=http://xlink.rsc.org/?DOI=D0DT03307C|journal=Dalton Transactions|volume=49|issue=48|language=en|pages=17658–17664|doi=10.1039/D0DT03307C|pmid=33231582 |s2cid=227157666 |issn=1477-9226}}

{{chem2|Ca(PO2F2)2*CH3COOCH2CH3}}

| Calcium difluorophosphate - ethyl acetate 1:1 solvate

|

|

|

|

|{{cite journal|last1=Grunze|first1=H.|last2=Jost|first2=K.-H.|last3=Wolf|first3=G.-U.|title=Salze von Halogenophosphorsäuren. V. Darstellung und Struktur des Bis(äthylacetat)-calcium-difluorophosphates Ca[PO2F2]2 · 2 CH3COOC2H5|trans-title=Salts of halophosphoric acids. V. Description and structure of bis(ethylacetate)calcium difluorophosphate...|journal=Zeitschrift für anorganische und allgemeine Chemie|date=April 1969|volume=365|issue=5–6|pages=294–300|doi=10.1002/zaac.19693650509}}

{{chem2|Ca(PO2F2)2}}

| Calcium difluorophosphate

|

|

|>345 °C {{abbr|d|decomposes}}

|

|

{{chem2|[VO2]+PO2F2−}}

| Pervanadyl difluorophosphate

|

|

|

|

|

{{chem2|CrO2(PO2F2)2}}

| Chromyl difluorophosphate

|

|

|

| formed from anhydride; red-brown

|{{cite journal|last1=Brown|first1=S.D.|last2=Emme|first2=L.M.|last3=Gard|first3=G.L.|title=The reaction of chromium trioxide and metal oxide salts with P2O3F4|journal=Journal of Inorganic and Nuclear Chemistry|date=December 1975|volume=37|issue=12|pages=2557–2558|doi=10.1016/0022-1902(75)80891-8}}

{{chem2|Cr(PO2F2)3}}

| Chromium(III) difluorophosphate

|

| 320, 385, 490, 575, 905, 955, 1165, 1255 cm−1

|

| formed from excess anhydride, green

|

{{chem2|Mn(CO)5PO2F2}}{{cln|reason=What is the oxidation state and valence of manganese and what is the molecular structure of this compound?|date=April 2023}}

|

|

|

| 184 °C

|

|{{cite journal|last1=Wimmer|first1=F.L.|last2=Snow|first2=M.R.|title=Perchlorate and difluorophosphate coordination derivatives of manganese carbonyl|journal=Australian Journal of Chemistry|date=1978|volume=31|issue=2|pages=267|doi=10.1071/CH9780267}}

{{chem2|HMn(PO2F2)3}}{{cln|reason=What is the oxidation state and valence of manganese and what is the molecular structure of this compound?|date=April 2023}}

|

|

|

|

| dissolve manganese in acid; white

|

{{chem2|[NH4+](Mn(2+))3(PO2F2−)(PO3F(2−))2(F−)2}}

|

|

|

|

|

|{{Cite journal|last1=Weil|first1=Matthias|last2=Fürst|first2=Markus|date=2020-07-01|title=Crystal structure of (1,4-diphenyl-4H-1,2,4-triazol-3-yl)phenylamine difluorophosphate, and a survey of the difluorophosphate anion (PO2F2−)|journal=Acta Crystallographica Section E|volume=76|issue=7|pages=1003–1006|doi=10.1107/S2056989020006933|pmid=32695441|pmc=7336792|issn=2056-9890|doi-access=free}}

{{chem2|Fe(PO2F2)2}}

| Iron(II) difluorophosphate

|

| 463, 496, 668 (weak), 869 (double), 1139, 1290 cm−1

| 180 °C {{abbr|d|decomposes}}

| colour blue green, hygroscopic, melts 250 °C, above 300 °C starts decomposing to iron(II) phosphate

|

{{chem2|Fe(PO2F2)3}}

| Iron(III) difluorophosphate

|

| 262, 493, 528, 570, 914, 965, 1173, 1242 cm−1

|>400 °C

| decomposes at 230 °C yielding iron(III) fluoride; dissolve iron in acid in presence of oxygen

|

{{chem2|K+(Fe(2+))3(PO2F2−)(PO3F(2−))2(F−)2}}

|

|

|

|

|

|

{{chem2|Co(PO2F2)2}}

| Cobalt(II) difluorophosphate

|

|

| 173 °C

| prepared from Cobalt(II) chloride and acid; pink or blue; blue formed by heating pink to 140 °C

|

{{chem2|HCo(PO2F2)3}}{{cln|reason=What are the oxidation states and valences of cobalt and what is the molecular structure of this compound?|date=April 2023}}

|

|

|

|

| dissolve cobalt in acid; red-purple

|{{cite journal|last1=Dove|first1=Michael F. A.|last2=Hibbert|first2=Richard C.|last3=Logan|first3=Norman|title=Difluorophosphate complexes of chromium, manganese, iron, cobalt, and nickel|journal=Journal of the Chemical Society, Dalton Transactions|date=1985|issue=4|pages=707|doi=10.1039/DT9850000707}}

{{chem2|Co(PO2F2)2*2CH3CN}}

| Cobalt(II) difluorophosphate - methyl cyanide solvate 1:2

| orthorhombic: a = 9.227 Å, b = 13.871 Å, c = 9.471 Å, V = 1212 Å3, Z = 4, density = 1.88 g/cm3

|

|

| treat {{chem2|HCo(PO2F2)3}} with Acetonitrile for a few weeks; red crystals

|

{{chem2|[NH4+](Co(2+))3(PO2F2−)(PO3F(2−))2(F−)2}}

|

|

|

|

|

|

{{chem2|Ni(PO2F2)2}}

| Nickel(II) difluorophosphate

|

|

| 255 °C {{abbr|d|decomposes}}

| slowly prepared from Nickel(II) chloride and acid; yellow

|

{{chem2|HNi(PO2F2)3}}{{cln|reason=What are the oxidation states and valences of cobalt and what is the molecular structure of this compound?|date=April 2023}}

|

|

|

|

| dissolve nickel in acid; yellow

|

{{chem2|Cu(PO2F2)2}}

| Copper(II) difluorophosphate

| orthorhombic Fddd: a = 10.134 Å, b = 24.49 Å, c = 34.06 Å, Z = 48, V = 8454.3 Å3, density = 2.50 g/cm3

|

| 265 °C {{abbr|d|decomposes}}

| pale blue needles

|{{cite journal|last1=Begley|first1=Michael J.|last2=Dove|first2=Michael F. A.|last3=Hibbert|first3=Richard C.|last4=Logan|first4=Norman|last5=Nunn|first5=Michael|last6=Sowerby|first6=D. Bryan|title=Crystal structures of the difluorophosphate complexes, Co(O2PF2)2 · 2MeCN and Cu(O2PF2)2|journal=Journal of the Chemical Society, Dalton Transactions|date=1985|issue=11|pages=2433–2436|doi=10.1039/DT9850002433}}

{{chem2|CuI(xantphos)2(μ\-PO2F2)}}

|

| polymeric; monoclinic: a = 12.435 Å, b = 10.887 Å, c = 25.682 Å, β = 100.220°, V = 3421 Å3

|

|

| colourless

|{{cite journal|last1=Keller|first1=Sarah|last2=Brunner|first2=Fabian|last3=Prescimone|first3=Alessandro|last4=Constable|first4=Edwin C.|last5=Housecroft|first5=Catherine E.|title=Hexafluoridophosphate partial hydrolysis leading to the one-dimensional coordination polymer [{Cu(xantphos)(μ-PO2F2)}n]|journal=Inorganic Chemistry Communications|date=August 2015|volume=58|pages=64–66|doi=10.1016/j.inoche.2015.06.002}}

{{chem2|Zn(PO2F2)2}}

| Zinc(II) difluorophosphate

|

|

|{{circa|25}} °C?

| glassy

|

{{chem2|H2[Zn(PO2F2)4]}}

| Tetra(difluorophosphato)zincic(II) acid

|

|

|

|

|

{{chem2|Ga(PO2F2)3}}

| Gallium(III) difluorophosphate

|

|

|

|

|

{{chem2|[(CH3)2GaPO2F2]2}}

| Dimethylgallium(III) difluorophosphate

| dimeric

| 380, 492, 520, 551, 616, 709, 750, 899, 949, 1171, 1218, 1262, 1295, 1404, 2922, 2982 cm−1

|

|

|{{cite journal|last1=Schaible|first1=B.|last2=Weidlein|first2=J.|title=Untersuchungen an Dialkylmetallphosphor- und -phosphinsäurederivaten der Elemente Aluminium, Gallium, Indium und Thallium. II. Die Schwingungsspektren der Difluoro- und Dichlorophosphate|trans-title=Investigations upon dialkylmetal phosphate and phosphite derivatives of the elements aluminium, gallium, indium and thallium. II. The vibrational spectroscopy of difluoro- and dichlorophosphates|journal=Zeitschrift für anorganische und allgemeine Chemie|date=February 1974|volume=403|issue=3|pages=301–309|doi=10.1002/zaac.19744030309}}

{{chem2|RbPO2F2}}

| Rubidium difluorophosphate

| orthorhombic: a = 8.15 Å, b = 6.45 Å, c = 7.79 Å, Z = 4, V = 409.5 Å3 density = 3.02 g/cm3

| P–F stretching 827 and 946 cm−1; P–O stretching 1145 and 1320 cm−1

| 160 °C

| white

|

{{chem2|Sr(PO2F2)2}}

| Strontium difluorophosphate

|

|

| 250 °C {{abbr|d|decomposes}}

| prepared from strontium chloride and acid

|

{{chem2|[NH4]Sr(PO2F2)3}}

| Ammonium strontium difluorophosphate

|Triclinic P{{overbar|1}} a=7.370 b=11.054 c=13.645 α=88.861 β=87.435° γ=89.323°

|

|

|

|

{{chem2|AgPO2F2}}

| Silver(I) difluorophosphate

|

|

|

|

|{{cite journal|last1=Albrecht|first1=Markus|last2=Hübler|first2=Klaus|last3=Kaim|first3=Wolfgang|date=May 2000|title=Syntheses, Structures, and Properties of the Complexes [Ag(N∧S)n](X), N∧S = 1-Methyl-2-(alkylthiomethyl)-1H-benzimidazoles, X = PF6 (n = 2) or PO2F2 (n = 1)|journal=Zeitschrift für anorganische und allgemeine Chemie|volume=626|issue=5|pages=1033–1037|doi=10.1002/(SICI)1521-3749(200005)626:5<1033::AID-ZAAC1033>3.0.CO;2-A}}

{{chem2|Ag9(PO2F2)14}}{{cln|What is the oxidation state of silver and what is the molecular structure?|date=April 2023}}

|

|

|

|

|

|

Ag(1-methyl-2-alkylthiomethyl-1H-benzimidazole){{chem2|PO2F2}}

|

|

|

|

|

|

Ag(2,6-bis-[(2-methylthiophenyl)-2-azaethenyl]pyridine){{chem2|PO2F2}}

|

| Triclinic P1: a = 7.687 Å, b = 10.740 Å, c = 13.568 Å, α = 99.52°, β = 96.83°, γ = 99.83°, Z = 2, V = 1076 Å3, density = 1.81 g/cm3

|

|

|

|{{cite journal|last1=Fessler|first1=Th. U.|last2=Hübener|first2=R.|last3=Strähle|first3=J.|title=Synthese von Kupfer- und Silberkomplexen mit fünfzähnigen N,S- und sechszähnigen N,O-Chelatliganden – Charakterisierung und Kristallstrukturen von {Cu2[C6H4(SO2)NC(O)]2(C5H5N)4}, {Cu2[C5H3N(CHNC6H4SCH3)2]2}(PF6)2 und {Ag[C5H3N(CHNC6H4SCH3)2]}PO2F2|trans-title=Synthesis of copper und silver complexes with pentadentate N,S- und hexadentate N,O-chelation ligands – characterization und crystal structures of...|journal=Zeitschrift für anorganische und allgemeine Chemie|date=September 1997|volume=623|issue=9|pages=1367–1374|doi=10.1002/zaac.19976230908}}

Ag(4,4′-dicyanodiphenylacetylene){{chem2|PO2F2}}

|

|

|

|

|

|

{{chem2|Cd(PO2F2)2}}

| Cadmium(II) difluorophosphate

|

|

| 245 °C {{abbr|d|decomposes}}

|

|

{{chem2|In(PO2F2)3}}

| Indium(III) difluorophosphate

|

| 269, 492, 528, 567, 910, 962, 1179, 1269 cm−1

|

| white, decomposes at 260 °C yielding indium trifluoride

|

{{chem2|[(CH3)2InPO2F2]2}}

| Dimethylindium(III) difluorophosphate

| dimeric

| 373, 490, 500, 535, 559, 735, 878, 925, 1128, 1179, 1275, 1435, 2928, 3000 cm−1

|

|

|

{{chem2|SnCl2(PO2F2)2}}

| Tin(IV) dichloride difluorophosphate

|

|

|

|

|{{cite journal|last1=Krüger|first1=N.|last2=Dehnicke|first2=K.|last3=Shihada|first3=A.-F.|title=Difluorophosphate von Zinn(IV) und Antimon(V)|trans-title=Difluorophosphates of tin(IV) and antimony(V)|journal=Zeitschrift für anorganische und allgemeine Chemie|date=February 1978|volume=438|issue=1|pages=169–175|doi=10.1002/zaac.19784380118}}

{{chem2|(CH3)2Sn(PO2F2)2}}

| Dimethyltin(IV) difluorophosphate

|

|

| 204 °C {{abbr|d|decomposes}}

| prepared from {{chem2|(CH3)2SnCl2}} and acid; yellow

|

{{chem2|(CH3CH2)2Sn(PO2F2)2}}

| Diethyltin(IV) difluorophosphate

|

|

| 262 °C {{abbr|d|decomposes}}

| prepared from {{chem2|(CH3CH2)2SnCl2}} and acid; yellow

|

{{chem2|(CH3CH2CH2)2Sn(PO2F2)2}}

| Dipropyltin(IV) difluorophosphate

|

|

| 245 °C {{abbr|d|decomposes}}

| prepared from {{chem2|(CH3CH2CH2)2SnCl2}} and acid; yellow

|

{{chem2|(CH3(CH2)3)2Sn(PO2F2)2}}

| Dibutyltin(IV) difluorophosphate

|

|

| 235 °C {{abbr|d|decomposes}}

| prepared from {{chem2|(CH3(CH2)7)2SnCl2}} and acid; yellow

|

{{chem2|(CH3(CH2)7)2Sn(PO2F2)2}}

| Dioctyltin(IV) difluorophosphate

|

|

| 114 °C

| prepared from {{chem2|(CH3(CH2)7)2SnCl2}} and acid; yellow

|

{{chem2|SbCl4PO2F2}}

| Antimony(V) tetrachloride difluorophosphate

|

|

|

|

|

{{chem2|SbF4PO2F2}}

| Antimony(V) tetrafluoride difluorophosphate

|

|

|

|

|

(2,2-dipyradyl){{chem2|2Re(CO)2PO2F2}}{{cln|reason=What on this Earth is "dipyradyl"??? And what is the molecular structure of this compound??? And what is the oxidation state of rhenium in this compound???|date=April 2023}}

|

|

|

|

|

|

Au[bis(triphenylphosphine sulfide-S)]{{chem2|PO2F2}}{{cln|What on this Earth is "triphenylphosphine sulfide-S"??? And what is the molecular structure of this compound??? And what is the oxidation state of gold in this compound???|date=April 2023}}

|

|

|

|

|

|{{cite journal|last1=LeBlanc|first1=D. J.|last2=Britten|first2=J. F.|last3=Lock|first3=C. J. L.|title=Bis(triphenylphosphine sulfide-)gold(I) Difluorophosphate(V)|journal=Acta Crystallographica Section C|date=15 September 1997|volume=53|issue=9|pages=1204–1206|doi=10.1107/S0108270197005209|doi-access=free}}

{{chem2|IO2PO2F2}}{{cln|reason=What is that IO2 group in this formula? What is the valence of iodine here? Is it a monovalent iodyl group –IO2, with a 5-valent iodine or a monovalent group –O–I=O, with a 3-valent iodine?|date=May 2023}}

|

|

| Raman: 130, 163, 191, 219, 295, 323, 329, 378, 637, 713, 737, 781, 799, 839, 918, 1163 cm−1

|

| yellowish colour, produced from iodine trioxide, decomposed by water

|{{cite journal|last1=Addou|first1=A.|last2=Vast|first2=P.|title=Préparation de nouveaux difluorodioxophosphates à partir de l'oxyde de difluorure de phosphoryle. Partie II. Réactions sur les acides iodique et periodique|trans-title=Preparation of new difluorodioxophosphates from phosphoryl difluoride oxide. Part II. Reactions with iodic and periodic acids|journal=Journal of Fluorine Chemistry|date=July 1980|volume=16|issue=1|pages=89–96|doi=10.1016/s0022-1139(00)85151-9}}

{{chem2|IO3PO2F2}}{{cln|reason=What is that IO3 group in this formula? What is the valence of iodine here? Is it a monovalent periodyl group –IO3, with a 7-valent iodine or iodyloxy group –O–IO2, with a 5-valent iodine?|date=May 2023}}

|

|

| Raman: 217, 247, 269, 305, 343, 367, 395, 473, 569, 643, 671, 717, 797, 891, 1123 cm−1

|

| yellowish colour, produced from periodic acid, decomposed by water

|

{{chem2|FXePO2F2}}

| Xenon(II) fluoride difluorophosphate

|

|

|

|

|{{cite journal|last1=Eisenberg|first1=Max|last2=Desmarteau|first2=Darryl D.|title=Xenon(II) difluorophosphates. Preparations, properties, and evidence for the difluorophosphate free radical|journal=Inorganic Chemistry|date=August 1972|volume=11|issue=8|pages=1901–1904|doi=10.1021/ic50114a033}}

{{chem2|Xe(PO2F2)2}}

| Xenon(II) difluorophosphate

|

|

|

|

|

{{chem2|CsPO2F2}}

| Caesium difluorophosphate

| orthorhombic: a = 8.437 Å, b = 6.796 Å, c = 8.06 Å, Z = 4, V = 462.1 Å3, density = 3.36 g/cm3

|

| 286 °C

|

|

{{chem2|(Cs+)2(Fe(3+))2(PO2F2−)(PO3F(2−))2(F−)3}}

|

|

|

|

|

|

{{chem2|Ba(PO2F2)2}}

| Barium difluorophosphate

|orthorhombic I{{overbar|4}}2d a =10.4935 b =10.4935 c =26.030

|

|>400 °C

|

|

{{chem2|[NH4]2Ba(PO2F2)4}}

| Diammonium barium difluorophosphate

|P2/n a=14.285 b=5.472 c=19.474 β=97.607°

|

|

|

|

{{chem2|Re(CO)5PO2F2}}

|

|

|

|

|

|{{cite journal|last1=Horn|first1=E.|last2=Snow|first2=M.R.|title=Perchlorate and difluorophosphate coordination derivatives of rhenium carbonyl|journal=Australian Journal of Chemistry|date=1980|volume=33|issue=11|pages=2369|doi=10.1071/CH9802369}}

{{chem2|Hg(PO2F2)2}}

| Mercury(II) difluorophosphate

|

|

|

|

|

{{chem2|Hg2(PO2F2)2}}

| Mercury(I) difluorophosphate or di(difluorophosphato)dimercurane

| Raman: 220 cm−1

|

| produced from anhydride

|

{{chem2|TlPO2F2}}

| Thallium(I) difluorophosphate

|

|

|

| produced from anhydride, or acid on TlCl

|

{{chem2|[(CH3)2TlPO2F2]2}}

| Dimethylthallium(III) difluorophosphate

| dimeric

| 360, 374, 500, 505, 520, 559, 850, 880, 1120, 1140, 1195, 1250, 1285, 2932, 3020 cm−1

|

|

|

{{chem2|Pb(PO2F2)2}}

| Lead(II) difluorophosphate

|

|

| 189 °C {{abbr|d|decomposes}}

|

|

{{chem2|UO2(PO2F2)2}}

| Uranyl difluorophosphate

|

| 260, 498, 854, 924, 980, 1124 cm−1

|

| IR spectrum due to uranyl

|

{{chem2|[(CH3CH2)4N]+PO2F2−}}

| Tetraethylammonium difluorophosphate

|

|

|

|

|{{cite journal|last1=Matsumoto|first1=Kazuhiko|last2=Okawa|first2=Takeshi|last3=Hagiwara|first3=Rika|title=The Crystal to Plastic Crystal Phase Transition of Tetraethylammonium Difluorophosphate and Tetrafluoroborate|journal=Chemistry Letters|date=2012|volume=41|issue=4|pages=394–396|doi=10.1246/cl.2012.394|hdl=2433/259816|s2cid=97011854 |hdl-access=free}}

| 1-ethyl-3-methylimidazolium difluorophosphate

|

|

|

| ionic liquid

|{{cite journal|last1=Matsumoto|first1=Kazuhiko|last2=Hagiwara|first2=Rika|title=A New Series of Ionic Liquids Based on the Difluorophosphate Anion|journal=Inorganic Chemistry|date=3 August 2009|volume=48|issue=15|pages=7350–7358|doi=10.1021/ic9008009|pmid=19580312}}

| 1-butyl-3-methylimidazolium difluorophosphate

|

|

|

| ionic liquid

|

| 1-butyl-1-methylpyrrolidinium difluorophosphate

|

|

|

| ionic liquid

|

| 1-butyl-1-methylpiperidinium difluorophosphate

|

|

|

| ionic liquid

|

| di(3,3′,4,4′-tetramethyl-2,2′,5,5′-tetraselenafulvalenium)difluorophosphate

|

|

|

| Transitions to a metallic state below {{cvt|137|K|C|0}}

|{{cite journal|last1=Eriks|first1=K.|last2=Wang|first2=H. H.|last3=Reed|first3=P. E.|last4=Beno|first4=M. A.|last5=Appelman|first5=E. H.|last6=Williams|first6=J. M.|title=Di(3,3′,4,4′-tetramethyl-2,2′,5,5′-tetraselenafulvalenium)difluorophosphate, (C10H12Se4)2PO2F2, at 293 and 125 K|journal=Acta Crystallographica Section C|date=15 February 1985|volume=41|issue=2|pages=257–260|doi=10.1107/S0108270185003535|url=https://zenodo.org/record/1236094|doi-access=free}}

| 1,4-diphenyl-3,5-enanilo-4,5-dihydro-1,2,4-triazole (nitron)

|monoclinic P21/n: a = 7.3811 Å, b = 14.9963 Å, c = 16.922 Å, β = 102.138°, V = 1361.2 Å3, Z = 4

|

|

| insoluble; yellow-brown

|

Strychnine {{chem2|PO2F2}}

|

|

|

|

|

|

Cocaine {{chem2|PO2F2}}

|

|

|

|

|

|

Brucine {{chem2|PO2F2}}

|

|

|

|

|

|

Morphine {{chem2|PO2F2}}

|

|

|

|

|

|

{{chem2|[N(CH3)4]+PO2F2−}}

| Tetramethylammonium difluorophosphate

|

|

|

|

|

{{chem2|H[B(PO2F2)4]}}

| Tetra(difluorophosphato)boric acid

|

| 469, 502, 552, 647, 836, 940, 994, 1093, 1348, 1567 cm−1

|

| formed from Boron tribromide and acid; liquid

|

{{chem2|Li[B(PO2F2)4]}}

| Lithium tetra(difluorophosphato)borate

| monoclinic P21/c: a=7.9074 Å, b = 14.00602 Å, c = 13.7851 Å, β = 121.913°, Z = 4

| 479, 502, 568, 833, 945, 1002, 1080, 1334 cm−1

|

| formed from {{chem2|HB(PO2F2)4}} and butyllithium; colourless

|

{{chem2|[HS(CH3)2]+[B(PO2F2)4]−}}

| Dimethylsulfonium tetra(difluorophosphato)borate

|

| 472, 511, 555, 648, 832, 933, 993, 1082, 1337, 1436, 2851, 2921, 3042 cm−1

|

| formed from {{chem2|BH3*S(CH3)2}} and acid; ionic liquid

|

{{chem2|[Li((CH3CH2)2O)+]3[Al(PO2F2)6]−}}

| (Diethyl ether)lithium hexa(difluorophosphato)aluminate

| trigonal R{{overline|3}}: a = 17.4058 Å, b = 17.4058 Å, c = 21.4947 Å, γ = 120°, Z = 6

| 417, 503, 536, 624, 723, 891, 922, 964, 1174, 1204, 1283 cm−1

|

| formed from butyllithium and triethylaluminium and the acid; white

|

{{chem2|K2CrO2(PO2F2)4}}

|

|

| 305, 370, 485, 550, 870, 920, 1050, 1130, 1250 cm−1

| 145 °C {{abbr|d|decomposes}}

| formed from anhydride and potassium chromate; brown

|

{{chem2|Na2MoO2(PO2F2)4}}

|

| amorphous

| 280, 490, 620, 880, 915, 950, 1020, 1070, 1140, 1280 cm−1

| 125 °C {{abbr|d|decomposes}}

| formed from anhydride and potassium molybdate; white

|

{{chem2|Na2WO2(PO2F2)4}}

|

| amorphous

| 280, 474, 620, 930, 1030, 1130, 1230 cm−1

| 109 °C {{abbr|d|decomposes}}

| formed from anhydride and potassium tungstate; white

|

Related substances

=Difluorphosphoric acid=

Difluorophosphoric acid ({{chem2|HPO2F2}}) is one of the fluorophosphoric acids. It is produced when phosphoryl fluoride reacts with water:

:{{chem2|POF3 + H2O → HPO2F2 + HF}}

This in turn is hydrolysed more to give monofluorophosphoric acid ({{chem2|H2PO3F}}), and a trace of hexafluorophosphoric acid ({{chem2|HPF6}}). {{chem2|HPO2F2}} also is produced when HF reacts with phosphorus pentoxide. Yet another method involves making difluorphosphoric acid as a side product of calcium fluoride being heated with damp phosphorus pentoxide. A method to make pure difluorphosphoric acid involves heating phosphoryl fluoride with monofluorophosphoric acid and separating the product by distillation:{{cite journal|last1=Lange|first1=Willy|last2=Livingston|first2=Ralph|title=Studies of Fluorophosphoric Acids and their Derivatives. XIV. Preparation of Anhydrous Difluorophosphoric Acid|journal=Journal of the American Chemical Society|date=March 1950|volume=72|issue=3|pages=1280–1281|doi=10.1021/ja01159a057}}

:{{chem2|POF3 + H2PO3F → 2 HPO2F2}}

Difluorophosphoric acid can also be produced by fluorinating phosphorus oxychlorides. {{chem2|P2O3Cl4}} and phosphoryl chloride react with hydrogen fluoride solution to yield {{chem2|HPO2Cl2}} and then {{chem2|HPO2F2}}.{{cite journal|last1=Semmoud|first1=A.|last2=Benghalem|first2=A.|last3=Addou|first3=A.|title=Acide difluorophosphorique: nouvelle préparation|trans-title=Difluorophosphoric acid: new preparation|journal=Journal of Fluorine Chemistry|date=January 1990|volume=46|issue=1|pages=1–6|doi=10.1016/S0022-1139(00)81555-9}} Yet another way is to treat orthophosphate ({{chem2|PO4(3−)}}) with fluorosulfuric acid ({{chem2|HSO3F}}).{{cite journal|last1=Vast|first1=P.|last2=Semmoud|first2=A.|last3=Addou|first3=A.|last4=Palavit|first4=G.|title=Nouvelle méthode de preparation de l'acide difluorophosphorique|trans-title=New preparation method of difluorophosphoric acid|journal=Journal of Fluorine Chemistry|date=March 1985|volume=27|issue=3|pages=319–325|doi=10.1016/S0022-1139(00)81312-3}}

Difluorphosphoric acid is a colorless liquid. It melts at {{cvt|−96.5|C|F}} and boils at {{cvt|115.9|C|F}}. Its density at 25 °C is 1.583 g/cm3.{{cite thesis|last1=Reed|first1=William|title=Studies of Difluorophosphoric Acid and its Alkali Metal Salts|date=September 1965|url=https://open.library.ubc.ca/media/download/pdf/831/1.0062126/2|access-date=23 April 2023}}

=Phosphoryl difluoride oxide=

Difluorophosphoric acid anhydride also known as phosphoryl difluoride oxide or diphosphoryl tetrafluoride ({{chem2|F2(O\d)P\sO\sP(\dO)F2}} or {{chem2|P2O3F4}}) is an anhydride of difluorphosphoric acid. It crystallises in the orthorhombic system, with space group Pcca and Z = 4.{{cite journal|last1=Zeng|first1=Xiaoqing|last2=Gerken|first2=Michael|last3=Beckers|first3=Helmut|last4=Willner|first4=Helge|title=ChemInform Abstract: Spectroscopic and Structural Studies of Difluorophosphoryl Azide F2P(O)N3, Difluorophosphoryl Isocyanate F2P(O)NCO, and Difluorophosphoric Acid Anhydride, F2(O)POP(O)F2|journal=ChemInform|date=17 June 2010|volume=41|issue=28|pages=no|doi=10.1002/chin.201028001}} Originally in Inorg. Chem. 49 (2010) 6, 3002–3010 {{chem2|P2O3F4}} can be made by refluxing difluorophosphoric acid with phosphorus pentoxide. {{chem2|P2O3F4}} boils at 71 °C.{{cite journal|last1=Robinson|first1=E. A.|title=The Preparation and Raman Spectrum of Diphosphoryl Tetrafluoride: Comparison with the Spectrum of Diphosphoryl Tetrachloride|journal=Canadian Journal of Chemistry|date=September 1962|volume=40|issue=9|pages=1725–1729|doi=10.1139/v62-264|doi-access=free}}

=Substitution=

In addition to the isoelectronic series, ions related by substituting fluorine or oxygen by other elements include monofluorophosphate, difluorothiophosphate, dichlorothiophosphate, dichlorophosphate, chlorofluorothiophosphate, chlorofluorophosphate, dibromophosphate, and bromofluorophosphate.{{cite journal|last1=Dehnicke|first1=Kurt|last2=Shihada|first2=Abdel-Fattah|title=Structural and bonding aspects in phosphorus chemistry—inorganic derivatives of oxohalogeno phosphoric acids|journal=Electrons in Oxygen- and Sulphur-Containing Ligands Structure and Bonding|date=1976|isbn=978-3-540-07753-4|volume=28|pages=51–82|doi=10.1007/3-540-07753-7_2|series=Structure and Bonding}}

=Adducts=

Difluorophosphate can form adducts with {{chem2|PF5}} and {{chem2|AsF5}}. In these the oxygen atoms form a donor-acceptor link between the P and As (or P) atoms, linking the difluorides to the pentafluorides. Example salts include {{chem2|KPO2F2*2AsF5}}, {{chem2|KPO2F2*AsF5}}, {{chem2|KPO2F2*2PF5}} and {{chem2|KPO2F2*PF5}}.{{cite journal|last1=Christe|first1=K. O.|last2=GNANN|first2=R.|last3=WAGNER|first3=R. I.|last4=WILSON|first4=W. W.|title=ChemInform Abstract: The (PO2F2×2 AsF5)− Anion, an Example of a Stable, Oxygen- Bridged, 1:2 Donor-Acceptor Polynuclear Anion|journal=ChemInform|date=4 August 2010|volume=28|issue=2|pages=no|doi=10.1002/chin.199702025}} Full article at Eur. J. Solid State Inorg. Chem. 33 (1996) 9, 865–877

Amines can react with phosphoryl fluoride to make substances with a formula {{chem2|RR′N\sP(\dO)F2}}. The amines shown to do this include ethylamine, isopropylamine, n-butylamine, t-butylamine, dimethylamine, and diethylamine. The monoamines can further react to yield an alkyliminophosphoric fluoride ({{chem2|R\sN\dP(\dO)F}}).{{cite journal|last1=Olah|first1=Georg|last2=Oswald|first2=Alexius|last3=Kuhn|first3=Stephan|title=Untersuchung organischer Phosphorverbindungen. III. Darstellung von Difluorphosphorsäure- und von Difluorthiophosphorsäure-alkylamiden|trans-title=Investigations of organic phosphorus compounds. III. description of difluorophosphoric and difluorothiophosphoric alkylamides|journal=Justus Liebigs Annalen der Chemie|date=4 August 1959|volume=625|issue=1|pages=88–91|doi=10.1002/jlac.19596250111}}

References

{{Reflist|30em}}

Category:Phosphorus oxyanions

Category:Fluorophosphates

Category:Anions