Vanadyl ion

Not to be confused with the pervanadyl ion, with the formula VO+
2.
Structure of vanadyl acetylacetonate
Cavansite, a mineral containing the vanadyl cation that illustrates its characteristic color

The vanadyl or oxovanadium(IV) cation, VO2+,[1] is a functional group that is common in the coordination chemistry of vanadium. Complexes containing this functional group are characteristically blue and paramagnetic. A triple bond is proposed to exist between the V4+ and O2− centers.[2] The description of the bonding in the vanadyl ion was central to the development of modern ligand-field theory.[3]

  1. ^ Bertrand, Gary L.; Stapleton, George W.; Wulff, Clause A.; Hepler, Loren G. (July 1966). "Thermochemistry of Aqueous Pervanadyl and Vanadyl Ions". Inorg. Chem. 5 (7): 1283–1284. doi:10.1021/ic50041a048.
  2. ^ Gray, H. B.; Winkler, J. R. (2018). "Living with Oxygen". Accounts of Chemical Research. 51 (8): 1850–1857. doi:10.1021/acs.accounts.8b00245. PMC 6106048. PMID 30016077.
  3. ^ Ballhausen, C. J.; Gray, Harry B. (1962-02-01). "The Electronic Structure of the Vanadyl Ion". Inorganic Chemistry. 1 (1): 111–122. doi:10.1021/ic50001a022. ISSN 0020-1669.