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Vanadium(V) chloride

Chemical compound From Wikipedia, the free encyclopedia

Vanadium(V) chloride
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Vanadium(V) chloride is the inorganic compound with the formula VCl5. It is a black diamagnetic solid. The molecules adopt a bioctahedral structure similar to that of niobium(V) chloride.[1]

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Preparation and reactions

Chlorine cannot oxidise vanadium(IV); chlorination of vanadium metal will yield only vanadium(IV) chloride. Vanadium(V) chloride is instead prepared from vanadium pentafluoride with excess boron trichloride as a chlorinating agent:

2 VF5 + 10 BCl3[VCl5]2 + 10 BF2Cl

It is unstable at room temperature, releasing gaseous chlorine and giving vanadium(IV) chloride:

[VCl5]2 → 2 VCl4 + Cl2

In contrast, the heavier analogues NbCl5 and TaCl5 are stable and not particularly oxidizing.

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References

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