Vanadyl perchlorate or vanadyl triperchlorate is a golden yellow coloured liquid or crystalline compound of vanadium, oxygen and perchlorate. The substance consists of molecules covalently bound and is quite volatile; it ignites organic solvents on contact and explodes at temperatures above 80 ðC.
Vanadyl perchlorate can be made by reacting vanadium pentoxide with dichlorine heptoxide at 5 ðC. It is purified by vacuum distillation and recrystallisation at 21 ðC.
A solution of vanadium(V) perchlorate can be made by dissolving vanadium pentoxide in perchloric acid.
The reaction of vanadium pentoxide and dichlorine hexoxide could produce VO(ClO<sub>4</sub>)<sub>3</sub>:
It can react with vanadium oxychloride to form another vanadyl perchlorate (VO<sub>2</sub>ClO<sub>4</sub>):
Other perchlorates include pervanadyl perchlorate, also known as dioxovanadium perchlorate, which contains VO<sub>2</sub><sup>+</sup> ions, vanadyl diperchlorate, oxovanadium perchlorate or vanadium(IV) perchlorate, and VO(ClO<sub>4</sub>)<sub>2</sub>, which dissolves in water. Vanadic perchlorate, also known as vanadium(III) perchlorate solution in water, is a green-tinged blue colour, significantly different to most other V(III) solutions, which are complexed.