Disupersilylsilanides M(SiHR2*)(2) of metals of the zinc group (M = Zn, Cd, Hg; R* = SitBu(3)): Syntheses, characterization, and structures

Bis(disupersilyl)silylmetals M(SiHR2*)(2) (R* = Supersilyl = SirBu(3)) with M = Zn, Cd, Hg are obtained in tetrahydrofuran/benzene/pentane by the reac tion of NaSiHR2* with ZnCl2, CdI2, HgCl2 in the molar ratio 2:1. The compou nds form colorless, in organic media soluble, not hydrolysis- and air-sensi tive crystals, the stabilities of which for thermolysis or photolysis decre ase in the row Zn > Hg > Cd compound. According to X-ray structure analyses , the compounds M(SiHR2*)(2) are monomeric with a - to date not observed - non-linear framework -M- tangle SiMSi for M(SiHR2*)(2) with M = Zn/Cd/Hg 17 0.7/174.2/174.4 degrees).