Organometallic dioxotungsten(VI) complexes of the hydrotris(3,5-dimethyl-1-pyrazolyl)borate ligand

Article abstract of DOI:10.1021/om00044a039

Reaction of WO₂Cl₂ with K{HB(Me₂pz)₃} [HB-(Me₂pz)₃^- = hydrotris(3,5-dimethyl-1-pyrazolyl)borate anion] in N,N-dimethylformamide produces cis-{HB-(Me₂pz)₃}WO₂Cl (1), which reacts with Grignard reagents in tetrahydrofuran to yield the organometallic dioxo-W(VI) complexes cis-{HB(Me₂pz)₃}WO₂(R) (R = Me (2), Et (3), CH₂Ph (4). Ph (5)). The X-ray structures of 3 and 5 reveal that the monomerlc complexes possess distorted-octahedral coordination spheres composed of a facially tridentate HB(Me₂pz)₃^- ligand, two terminal oxo ligands, and an n¹-hydrocarbyl group.