Vanadium tetrafluoride

Vanadium(IV) fluoride
Names
	IUPAC name vanadium tetrafluoride
Identifiers
CAS Number	10049-16-8;
3D model (JSmol)	Interactive image;
ChemSpider	11226730 ;
ECHA InfoCard	100.030.143
EC Number	233-171-7;
PubChem CID	44717705;
UNII	M372NC1A3B ;
UN number	UN2923
CompTox Dashboard (EPA)	DTXSID50894991 ;
	InChI InChI=1S/4FH.V/h41H;/q;;;;+4/p-4 Key: JTWLHYPUICYOLE-UHFFFAOYSA-J ; InChI=1/4FH.V/h41H;/q;;;;+4/p-4 Key: JTWLHYPUICYOLE-XBHQNQODAC;
	SMILES [V+4].[F-].[F-].[F-].[F-];
Properties
Chemical formula	F4V
Molar mass	126.9351 g·mol−1
Appearance	Lime green powder, hygroscopic
Odor	Odorless
Density	3.15 g/cm3 (20 °C); 2.975 g/cm3 (23 °C)
Melting point	325 °C (617 °F; 598 K) ; at 760 mmHg decomposes
Boiling point	Sublimes
Solubility in water	Very soluble
Solubility	Soluble in acetone, acetic acid; Very slightly soluble in SO2Cl2, alcohols, CHCl3
Structure
Crystal structure	Monoclinic, mP10
Space group	P21/c, No. 14
Thermochemistry
Std molar; entropy (S⦵298)	126 J/mol·K
Std enthalpy of; formation (ΔfH⦵298)	−1412 kJ/mol
Gibbs free energy (ΔfG⦵)	−1312 kJ/mol
Hazards
	Occupational safety and health (OHS/OSH):
Eye hazards	Causes serious damage
Skin hazards	Causes burns
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H314, H330
Precautionary statements	P260, P301+P310, P303+P361+P353, P304+P340, P305+P351+P338, P320, P330, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Vanadium(IV) fluoride (V F₄) 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. It decomposes before melting.