User:Praseodymium-141/Vanadium compounds

Halide derivatives[edit]

Twelve binary halides, compounds with the formula VX_n (n=2..5), are known. VI₄, VCl₅, VBr₅, and VI₅ do not exist or are extremely unstable. In combination with other reagents, VCl₄ is used as a catalyst for polymerization of dienes. Like all binary halides, those of vanadium are Lewis acidic, especially those of V(IV) and V(V). Many of the halides form octahedral complexes with the formula VX_nL_6−n (X= halide; L= other ligand).

Vanadium(III) halides[edit]

Vanadium(IV) halides[edit]

Vanadium(V) halides[edit]

Of the vanadium(V) halides, only vanadium(V) fluoride is known.

Oxyhalides[edit]

Many vanadium oxyhalides (formula VO_mX_n) are known.^[1] The oxytrichloride and oxytrifluoride (VOCl₃ and VOF₃) are the most widely studied. Akin to POCl₃, they are volatile, adopt tetrahedral structures in the gas phase, and are Lewis acidic.

^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 993. ISBN 978-0-08-037941-8.

[1] Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 993. ISBN 978-0-08-037941-8.

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