Vanadium oxydichloride is the

inorganic compound In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemist ...

with the formula VOCl₂. One of several

oxychloride In chemistry, molecular oxohalides (oxyhalides) are a group of chemical compounds in which both oxygen and halogen atoms are attached to another chemical element A in a single molecule. They have the general formula , where X = fluorine (F), chlor ...

s of vanadium, it is a hygroscopic green solid. It is prepared by

comproportionation Comproportionation or synproportionation is a chemical reaction where two reactants containing the same element but with different oxidation numbers, form a compound having an intermediate oxidation number. It is the opposite of disproportionation. ...

of vanadium trichloride and vanadium(V) oxides: :V₂O₅ + VOCl₃ + 3 VCl₃ → 6 VOCl₂ As verified by

X-ray crystallography X-ray crystallography is the experimental science determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions. By measuring the angles ...

, vanadium oxydichloride adopts a layered structure, featuring octahedral vanadium centers linked by doubly bridging oxide and chloride ligands. From VOCl₂, various blue or green-colored oxotri- and oxotetrachloride salts can be prepared. Examples include N(CH₃)₄VOCl₃ and the

pyridinium Pyridinium refers to the cation . It is the conjugate acid of pyridine. Many related cations are known involving substituted pyridines, e.g. picolines, lutidines, collidines. They are prepared by treating pyridine with acids. As pyridine is oft ...

derivative (C₅H₅NH)₂VOCl₄.

References

{{Vanadium compounds Vanadium(IV) compounds Oxychlorides Metal halides