Vanadium(III) chloride

Vanadium(III) chloride
	Anhydrous
Names
	IUPAC names Vanadium(III) chloride; Vanadium trichloride
Identifiers
CAS Number	7718-98-1 ;
3D model (JSmol)	anhydrous: Interactive image; hexahydrate: Interactive image;
ChemSpider	10801024 ;
ECHA InfoCard	100.028.859
EC Number	231-744-6;
PubChem CID	62647;
RTECS number	YW2800000;
UN number	2475
CompTox Dashboard (EPA)	DTXSID3064776 ;
	InChI InChI=1S/3ClH.V/h31H;/q;;;+3/p-3 Key: HQYCOEXWFMFWLR-UHFFFAOYSA-K ; InChI=1/3ClH.V/h31H;/q;;;+3/p-3 Key: HQYCOEXWFMFWLR-DFZHHIFOAB;
	SMILES anhydrous: Cl[V](Cl)Cl; hexahydrate: Cl[V-3](Cl)([OH2+])([OH2+])([OH2+])[OH2+].[Cl-].O.O;
Properties
Chemical formula	VCl3
Molar mass	157.30 g/mol
Appearance	violet crystals (anhydrous) ; green crystals (hexahydrate)
Density	2.8 g/cm3 (anhydrous) ; 1.84 g/cm3 (hexahydrate)
Melting point	350 °C (662 °F; 623 K) (decomposes, anhydrous)
Solubility in water	soluble
Magnetic susceptibility (χ)	+3030.0·10−6 cm3/mol
Structure
Crystal structure	Trigonal, hR24
Space group	R3, No. 148
Lattice constant	a = 6.012 Å, b = 6.012 Å, c = 17.34 Å α = 90°, β = 90°, γ = 120° (anhydrous)
Thermochemistry
Heat capacity (C)	93.2 J mol−1 K−1
Std molar; entropy (S⦵298)	131.0 J mol−1 K−1
Std enthalpy of; formation (ΔfH⦵298)	−580.7 kJ/mol
Gibbs free energy (ΔfG⦵)	−511.2 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H314
Precautionary statements	P260, P264, P270, P280, P301+P312+P330, P301+P330+P331, P303+P361+P353, P304+P340+P310, P305+P351+P338+P310, P363, P405, P501
NFPA 704 (fire diamond)	3 0 2
Flash point	Non-flammable
Related compounds
Other anions	Vanadium(III) fluoride; Vanadium(III) bromide; Vanadium(III) iodide
Other cations	Titanium(III) chloride; Chromium(III) chloride; Niobium(III) chloride; Tantalum(III) chloride
Related compounds	Vanadium(II) chloride; Vanadium(IV) chloride
	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(III) chloride describes the inorganic compound with the formula VCl₃ and its hydrates. It forms a purple anhydrous form and a green hexahydrate [VCl₂(H₂O)₄]Cl·2H₂O. These hygroscopic salts are common precursors to other vanadium(III) complexes and is used as a mild reducing agent.

Names
Anhydrous

IUPAC names Vanadium(III) chloride Vanadium trichloride
Identifiers
CAS Number	7718-98-1^Y
3D model (JSmol)	anhydrous: Interactive image hexahydrate: Interactive image
ChemSpider	10801024^Y
ECHA InfoCard	100.028.859
EC Number	231-744-6
PubChem CID	62647
RTECS number	YW2800000
UN number	2475
CompTox Dashboard (EPA)	DTXSID3064776
InChI InChI=1S/3ClH.V/h31H;/q;;;+3/p-3^Y Key: HQYCOEXWFMFWLR-UHFFFAOYSA-K^Y InChI=1/3ClH.V/h31H;/q;;;+3/p-3 Key: HQYCOEXWFMFWLR-DFZHHIFOAB
SMILES anhydrous: Cl[V](Cl)Cl hexahydrate: Cl[V-3](Cl)([OH2+])([OH2+])([OH2+])[OH2+].[Cl-].O.O
Properties
Chemical formula	VCl₃
Molar mass	157.30 g/mol
Appearance	violet crystals (anhydrous) green crystals (hexahydrate)
Density	2.8 g/cm³ (anhydrous) 1.84 g/cm³ (hexahydrate)
Melting point	350 °C (662 °F; 623 K) (decomposes, anhydrous)
Solubility in water	soluble
Magnetic susceptibility (χ)	+3030.0·10⁻⁶ cm³/mol
Structure
Crystal structure	Trigonal, hR24
Space group	R3, No. 148
Lattice constant	a = 6.012 Å, b = 6.012 Å, c = 17.34 Å α = 90°, β = 90°, γ = 120° (anhydrous)
Thermochemistry
Heat capacity (C)	93.2 J mol⁻¹ K⁻¹
Std molar entropy (S^⦵₂₉₈)	131.0 J mol⁻¹ K⁻¹
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−580.7 kJ/mol
Gibbs free energy (Δ_fG^⦵)	−511.2 kJ/mol
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H314
Precautionary statements	P260, P264, P270, P280, P301+P312+P330, P301+P330+P331, P303+P361+P353, P304+P340+P310, P305+P351+P338+P310, P363, P405, P501
NFPA 704 (fire diamond)	3 0 2
Flash point	Non-flammable
Related compounds
Other anions	Vanadium(III) fluoride Vanadium(III) bromide Vanadium(III) iodide
Other cations	Titanium(III) chloride Chromium(III) chloride Niobium(III) chloride Tantalum(III) chloride
Related compounds	Vanadium(II) chloride Vanadium(IV) chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references