Hypovanadic Bromide, VBr₄

Hypovanadic Bromide, vanadium tetrabromide, VBr₄, has not hitherto been isolated, but it is of interest to note that a double salt of composition VBr₄.SbBr₃.7H₂O has been obtained by dissolving antimony tribromide and vanadium pentoxide in hydrobromic acid and adding bromine.