Niobium(V) chloride

Niobium(V) chloride
Names
	IUPAC names Niobium(V) chloride; Niobium pentachloride
Identifiers
CAS Number	10026-12-7 NbCl5 [chemspider];
3D model (JSmol)	Interactive image; dimer: Interactive image;
ChemSpider	23203;
ECHA InfoCard	100.030.042
EC Number	233-059-8;
PubChem CID	24818;
RTECS number	QU0350000;
UNII	9S1BC7865F ;
CompTox Dashboard (EPA)	DTXSID7044348 ;
	InChI InChI=1S/5ClH.Nb/h5*1H;/q;;;;;+5/p-5 Key: YHBDIEWMOMLKOO-UHFFFAOYSA-I;
	SMILES Cl[Nb](Cl)(Cl)(Cl)Cl; dimer: Cl[Nb-]1(Cl)(Cl)(Cl)[Cl+][Nb-]([Cl+]1)(Cl)(Cl)(Cl)Cl;
Properties
Chemical formula	NbCl5
Molar mass	270.17 g/mol
Appearance	yellow monoclinic crystals ; deliquescent
Density	2.75 g/cm3
Melting point	204.7 °C (400.5 °F; 477.8 K)
Boiling point	248.2 °C (478.8 °F; 521.3 K)
Solubility in water	decomposes
Solubility	HCl, chloroform, CCl4
Thermochemistry
Std molar; entropy (S⦵298)	214.05 J K−1 mol−1
Std enthalpy of; formation (ΔfH⦵298)	-797.47 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H312, H314, H332
Precautionary statements	P260, P261, P264, P270, P271, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P310, P312, P321, P322, P330, P363, P405, P501
Flash point	Non-flammable
Related compounds
Other anions	Niobium(V) fluoride; Niobium(V) bromide; Niobium(V) iodide
Other cations	Vanadium(IV) chloride; Tantalum(V) chloride
Related niobium chlorides	Niobium(III) chloride; Niobium(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

Niobium(V) chloride, also known as niobium pentachloride, is a yellow crystalline solid. It hydrolyzes in air, and samples are often contaminated with small amounts of NbOCl₃. It is often used as a precursor to other compounds of niobium. NbCl₅ may be purified by sublimation.^[1]

^ Cotton, F. Albert; Wilkinson, Geoffrey (1980), Advanced Inorganic Chemistry (4th ed.), New York: Wiley, ISBN 0-471-02775-8

[1] Cotton, F. Albert; Wilkinson, Geoffrey (1980), Advanced Inorganic Chemistry (4th ed.), New York: Wiley, ISBN 0-471-02775-8

[1]

Names


IUPAC names Niobium(V) chloride Niobium pentachloride
Identifiers
CAS Number	10026-12-7 NbCl₅^{Y[chemspider]}
3D model (JSmol)	Interactive image dimer: Interactive image
ChemSpider	23203
ECHA InfoCard	100.030.042
EC Number	233-059-8
PubChem CID	24818
RTECS number	QU0350000
UNII	9S1BC7865F^Y
CompTox Dashboard (EPA)	DTXSID7044348
InChI InChI=1S/5ClH.Nb/h5*1H;/q;;;;;+5/p-5 Key: YHBDIEWMOMLKOO-UHFFFAOYSA-I
SMILES Cl[Nb](Cl)(Cl)(Cl)Cl dimer: Cl[Nb-]1(Cl)(Cl)(Cl)[Cl+][Nb-]([Cl+]1)(Cl)(Cl)(Cl)Cl
Properties
Chemical formula	NbCl₅
Molar mass	270.17 g/mol
Appearance	yellow monoclinic crystals deliquescent
Density	2.75 g/cm³
Melting point	204.7 °C (400.5 °F; 477.8 K)
Boiling point	248.2 °C (478.8 °F; 521.3 K)
Solubility in water	decomposes
Solubility	HCl, chloroform, CCl₄
Thermochemistry
Std molar entropy (S^⦵₂₉₈)	214.05 J K⁻¹ mol⁻¹
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	-797.47 kJ/mol
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H312, H314, H332
Precautionary statements	P260, P261, P264, P270, P271, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P310, P312, P321, P322, P330, P363, P405, P501
Flash point	Non-flammable
Related compounds
Other anions	Niobium(V) fluoride Niobium(V) bromide Niobium(V) iodide
Other cations	Vanadium(IV) chloride Tantalum(V) chloride
Related niobium chlorides	Niobium(III) chloride Niobium(IV) chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is ^YN ?) Infobox references