Vanadium pentachloride and molybdenum and rhenium hexachloride are all thermally unstable but can be prepared by metathesis from the corresponding fluorides with BCl(3) at low temperatures. MoCl(6) is structurally related to β-WCl(6), and ReCl(6) to α-WCl(6). VCl(5) is a dimer in the solid state (V red, Cl green).
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