Oxidative addition reactions of Cp*Os(CO)(PMe2Ph)Me (Cp* = η5-C5Me5). Isolation of intermediates during alkyl—metal electrophilic cleavage reactions

Synthesis of Hydride and Alkyl Compounds Containing the Cp*Os(η3-allyl) Fragment. Crystal Structures of Cp*Os(η3-C8H13)Br2and [Cp*Os(η3-C4H7)Me(H2O)][BF4]

“…Schrock and co-workers have isolated CpOs(C- t -Bu)(CH 2 -t -Bu) 2 by treatment of Os(C- t -Bu)(CH 2 - t -Bu) 2 (py) 2 (O 3 SCF 3 ) with NaCp . Baird and co-workers showed that the oxidation of Cp*Os(CO)(PMe 2 Ph)Me with bromine generated a product formulated as the osmium(IV) cation [Cp*Os(CO)(PMe 2 Ph)(Me)Br + ] . Recently, Shapley has compared the chemistry of the isoelectronic cyclopentadienyl, indenyl, and tris(pyrazolyl)borate complexes CpOsNPh 2 , IndOsNPh 2 , and Tp*OsNPh 2 …”