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Vanadium(II) chloride
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Vanadium(II) chloride : ウィキペディア英語版
Vanadium(II) chloride

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Vanadium(II) chloride is the inorganic compound with the formula VCl2, and is the most reduced vanadium chloride. Vanadium(II) chloride is an apple-green solid that dissolves in water to give purple solutions.〔
==Preparation, properties, and related compounds==
Solid VCl2 is prepared by thermal decomposition of VCl3, which leaves a residue of VCl2:〔Young, R. C.; Smith, M. E. "Vanadium(II) Chloride" Inorganic Syntheses, 1953, volume IV, page 126-127.〕
:2 VCl3 → VCl2 + VCl4
VCl2 dissolves in water to give the purple hexaaquo ion ()2+. Evaporation of such solutions produces crystals of ()Cl2.〔Martin Pomerantz, Gerald L. Combs, N. L. Dassanayake, "Vanadium Dichloride Solution" Inorganic Syntheses, 1982, vol. XXI, pp. 185–187. 〕

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