X-ray Structure of {HB(Me2pz)3}WVIO2(µ-O)WIVO(CO){HB(Me2pz)3},a Molecule Containing Rare cis-[WO(CO)]2 and syn-[WVI,WIVO3(µ-O)]2 Moieties [HB(Me2pz)3-= Hydrotris(3,5-dimethyl-1-pyrazolyl)borate]

Abstract

The study of high-valent organometallic oxo complexes has intensified in recent years, and a timely review by Bottomley and Sutin has appeared.2Interest in this area stems from the extensive use of metal oxides as catalysts for organic reactions and the likely involvement of organometallic oxo intermediates in these reactions.3The majority of known species are polynuclear cyclopentadienyl and alkyl complexes of oxophilic early transition metals or cluster µ-3oxo carbonyls of the group 8 and 94metals.2In contrast, noncluster oxo carbonyl complexes are extremely rare. In the early 1980strans-MO2(CO)4(M = MO, W),5,6and MO2(CO)2(M = Cr, Mo, W)6,7were identified by matrix isolation techniques and..