phosphoramide

{{see also|Phosphoramides}}

{{Chembox

| ImageFile = Phosphoramide.svg

| ImageSize = 150px

| ImageAlt =

| IUPACName = Phosphoric triamide

| OtherNames = {{ubl|Diaminophosphorylamine|Phosphoric amide|Phosphoryl triamide|Triaminophosphine oxide}}

| Section1 = {{Chembox Identifiers

| CASNo = 13597-72-3

| CASNo_Ref = {{cascite|correct|CAS}}

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = M27WLZ6CWP

| PubChem = 123317

| ChemSpiderID = 109920

| SMILES = NP(=O)(N)N

| InChI = 1/H6N3OP/c1-5(2,3)4/h(H6,1,2,3,4)

| InChIKey = DMSZORWOGDLWGN-UHFFFAOYAP

| StdInChI = 1S/H6N3OP/c1-5(2,3)4/h(H6,1,2,3,4)

| StdInChIKey = DMSZORWOGDLWGN-UHFFFAOYSA-N}}

| Section2 = {{Chembox Properties

| Formula = {{chem2|O\dP(NH2)3}}

| H=6|N=3|O=1|P=1

| Appearance = white solid

| pKa = <3.6{{cite book|title=Ionisation Constants of Inorganic Acids and Bases in Aqueous Solution|editor-first=D. D.|editor-last=Perrin|edition=2nd|series=IUPAC Chemical Data|issue=29|publisher=Pergamon|location=Oxford|year=1982|publication-date=1984|orig-date=1969|lccn=82-16524|isbn=0-08-029214-3|at=Entry 186}}

| Solubility = good

}}

| Section3 = {{Chembox Hazards

| MainHazards =

| FlashPt =

| AutoignitionPt =

}}

}}

Phosphoramide is a chemical compound with the molecular formula {{chem2|O\dP(NH2)3}}. It is a derivative of phosphoric acid in which each of the hydroxyl groups have been replaced with an amino group. In bulk, the compound is a white solid which is soluble in polar solvents.

Chemical properties

Phosphoramide arises from the reaction of phosphoryl chloride with ammonia. In moist air, it hydrolyzes to an ammonium salt:

:{{chem2|2 H2O + O\dP(NH2)3 → [NH4]+[PO2(OH)(NH2)]− + NH3}}

It reacts with sodium hydroxide with loss of ammonia:{{cite journal|journal=Chemische Berichte|title=Phosphoroxy‐triamid und Phosphorthio‐triamid|author=Robert Klement |author2=Otto Koch |volume=87|pages=333–340|year=1954|issue=3|doi=10.1002/cber.19540870308}}

:{{chem2|NaOH + O\dP(NH2)3 → Na+[PO2(NH2)2]− + NH3}}

The related thiophosphoryl triamide compound {{chem2|S\dP(NH2)3}} was made from the reaction of thiophosphoryl chloride with ammonia.

Phosphoramides

{{main|Phosphoramides}}

Phosphoramide is also the parent compound for a range of derivatives called phosphoramides.{{GoldBookRef|title=phosphoramides| file = A00484}} An example compound is the polar solvent hexamethylphosphoramide (HMPA).

References

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