Synthesis of Dioxobis( tert- alkylimido)osmium( VIII) and ... Anthony 0. Chong, Koichiro Oshima, and K. Barry Sharpless* Contribution from the Department of Chemistry, Massachiisetrs Institute of Technology, Cambridge, Massachusetts 021 39. Receiced December 6, 1976 ... Abstract: The synthesis and properties of dioxobis(terr-butylimido)osmium(Vl II) (5) and oxotris(terr-butylimidojosmium- (VIII) (6) are described. Other tert-alkylimido derivatives ...