Related compounds Molar mass 290.654 g/mol Appearance Gray-brown solid | Formula VBr3 Density 4 g/cm³ Pubchem 83509 | |
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Vanadium(III) bromide, also known as vanadium tribromide, is VBr3. In the solid-state, this species is a polymeric with octahedral vanadium(III) surrounded by six bromide ligands.
VBr3 has been prepared by treatment of VCl4 with HBr:
The reaction proceeds via the unstable vanadium(IV) bromide, VBr4, which releases Br2 at room temperature.
Like VCl3, VBr3 forms red-brown soluble complexes with dimethoxyethane and THF, such as mer-VBr3(THF)3.
Aqueous solutions prepared from VBr3 contain the salt trans-[VBr2(H2O)4]+. Evaporation of these solutions give the salt trans-[VBr2(H2O)4]Br.
References
Vanadium(III) bromide Wikipedia(Text) CC BY-SA