The anionic osmium complex Li[Os(CO2)(η-C5Me5)] (2a) was synthesized by the reaction of the hydrido complex (η-C5Me5Os(CO2)H (3a) with n-BuLi. The unsubstituted cyclopentadienyl derivatives M[Os(CO)2(η-C5H5)] (2b,M = Li; 2c, M = Na) were also prepared by an identical method or by two-electron reduction of (η-C5H5Os(CO)2I with sodium naphthalenide. Reactions of 2a with various electrophiles (CH3I, D2O, Me3SiCl, tBuSiH2Cl, Me3SiSiMe2Cl, Me2SiCl2, and Me3GeCl) afforded the nucleophilic substitution products (η-C5Me5)Os(CO)2R (R = CH3, D, SiMe3, SiH2tBu, SiMe2SiMe3, SiClMe2, and GeMe3) in good to excellent yields. Analogous products were also obtained by the reaction of 2b with tBuSiH2Cl and by the reactions of 2c with tBuSiH2Cl and tBuSiHCl2.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry