Chemistry of 2,3-dihydro-2-metallaphenalenes. Part 1. Synthesis of CHRSiMe2CHR′C10H6(R = R′= H; R = R′= SiMe3; and R,R′= H,SiMe3) and formation of the compound [{Li(Me2NCH2CH2NMe2)}2{CHSiMe2C(SiMe3)C10H6}]via decomposition of [{Li(Me2NCH2CH2NMe2)}2{1,8-(CHSiMe3)2C10H6}]; crystal structures of two polymorphs of the silicon heterocycle dilithium complex
Stereospecific synthisis of 2,3-dihydro-2-metallaphenalenes, meso-[M(η-C5H5)2R2][M = Zr, Hf; R2=(CHSiME3)2C10H6], via an unstable dilithium reagent, [R2{Li(tmeda)}2](tmeda = tetramethyl-ethylenediamine), which is coverted the complex [CHSiME2C(SiMe3)C10H6][Li(tmeda)]2containing a silicon heterocycle dicarbanion