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

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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. It decomposes before melting.
==Preparation and reactions==
VF4 can be prepared by treating VCl4 with HF:
:VCl4 + 4 HF → VF4 + 4 HCl
It was first prepared in this way.〔Otto Ruff, Herbert Lickfett "Vanadinfluoride" Chemische Berichte 1911, vol. 44, pages 2539–2549. 〕
It decomposes at 325 °C, undergoing disproportionation to the tri- and pentafluorides:〔
:2 VF4 → VF3 + VF5

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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