A Capped Octahedral MHC6Compound of a Platinum Group Metal

Article abstract of DOI:10.1002/chem.201601729

A MHC₆complex of a platinum group metal with a capped octahedral arrangement of donor atoms around the metal center has been characterized. This osmium compound OsH{κ²-C,C-(PhBIm-C₆H₄)}₃, which reacts with HBF₄to afford the 14 e^?species [Os{κ²-C,C-(PhBIm-C₆H₄)}(Ph₂BIm)₂]BF₄stabilized by two agostic interactions, has been obtained by reaction of OsH₆(PiPr₃)₂with N,N′-diphenylbenzimidazolium chloride ([Ph₂BImH]Cl) in the presence of NEt₃. Its formation takes place through the C,C,C-pincer compound OsH₂{κ³-C,C,C-(C₆H₄-BIm-C₆H₄)}(PiPr₃)₂, the dihydrogen derivative OsCl{κ²-C,C-(PhBIm-C₆H₄)}(η²-H₂)(PiPr₃)₂, and the five-coordinate osmium(II) species OsCl{κ²-C,C-(PhBIm-C₆H₄)}(PiPr₃)₂.