Vanadium tetrafluoride

{{chembox

| verifiedrevid = 402871120

| Name = Vanadium(IV) fluoride

| ImageFileL1 = VF4structure1.jpg

| ImageSizeL1 = 100px

| ImageNameL1 = 3D model of vanadium(IV) fluoride

| ImageFileR1 = VF4structure2.jpg

| ImageSizeR1 = 100px

| ImageNameR1 = 3D model of vanadium(IV) fluoride

| IUPACName = vanadium tetrafluoride

|Section1={{Chembox Identifiers

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 11226730

| InChI = 1/4FH.V/h4*1H;/q;;;;+4/p-4

| InChIKey = JTWLHYPUICYOLE-XBHQNQODAC

| SMILES = [V+4].[F-].[F-].[F-].[F-]

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/4FH.V/h4*1H;/q;;;;+4/p-4

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = JTWLHYPUICYOLE-UHFFFAOYSA-J

| CASNo = 10049-16-8

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

| UNII = M372NC1A3B

| PubChem = 44717705

| EINECS = 233-171-7

| UNNumber = UN2923

}}

|Section2={{Chembox Properties

| V=1 | F=4

| Appearance = Lime green powder, hygroscopic

| Odor = Odorless

| Density = 3.15 g/cm³ (20 °C)
2.975 g/cm³ (23 °C){{cite book|last = Kwasnik|first = W.|editor-last = Brauer|editor-first = Georg|year = 1963|title = Handbook of Preparative Inorganic Chemistry|url = https://archive.org/details/handbookpreparat01brau_517|url-access = limited|publisher = Academic Press|place = London|edition = UK|pages = [https://archive.org/details/handbookpreparat01brau_517/page/n276 252]–253}}

| Solubility = Very soluble

| SolubleOther = Soluble in acetone, acetic acid
Very slightly soluble in SO₂Cl₂, alcohols, CHCl₃

| MeltingPtC = 325

| MeltingPt_notes =
at 760 mmHg decomposes{{CRC90}}

| BoilingPt = Sublimes

}}

|Section3={{Chembox Structure

| CrystalStruct = Monoclinic, mP10

| SpaceGroup = P2₁/c, No. 14

}}

|Section4={{Chembox Thermochemistry

| DeltaHf = −1412 kJ/mol{{cite web|last = Anatolievich|first = Kiper Ruslan|website=chemister.ru|url = http://chemister.ru/Database/properties-en.php?dbid=1&id=408|title = vanadium(IV) fluoride|access-date = 2014-06-25}}

| DeltaGf = −1312 kJ/mol

| Entropy = 126 J/mol·K

}}

|Section7={{Chembox Hazards

| GHSPictograms = {{GHS05}} {{GHS06}}

| GHS_ref = {{cite web|title = Vanadium(IV) fluoride, 95%|url = http://www.alfa.com/en/catalog/11543|website=alfa.com|publisher = Alfa Aesar|access-date = 2014-06-25}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|300|330|314}}

| PPhrases = {{P-phrases|260|301+310|303+361+353|304+340|305+351+338|320|330|405|501}}

| SkinHazard = Causes burns

| EyeHazard = Causes serious damage

}}

}}

Vanadium(IV) fluoride (VF₄) is an inorganic compound of vanadium and fluorine. It is paramagnetic yellow-brown solid that is very hygroscopic. Unlike the corresponding vanadium tetrachloride, the tetrafluoride is not volatile because it adopts a polymeric structure.{{Cotton&Wilkinson6th|page=716}} It decomposes before melting.