Coordination Complexes of Zinc with Reactive ESiMe3 (E = S, Se, Te) Ligands

The complexes (N,N‘-tmeda)Zn(ESiMe3)2 (E = S, 1a; E = Se, 2a; E = Te, 3a) and (3,5-Me2-C5H3N)2Zn(ESiMe3)2 (E = S, 1b; E = Se, 2b; E = Te, 3b) have been prepared in high yield by the reaction of E(SiMe3)2 with (N,N‘-tmeda)Zn(OAc)2 (4a) and (3,5-Me2-C5H3N)2Zn(OAc)2 (4b), respectively. Complexes 1−3 have been characterized spectroscopically and by means of single-crystal X-ray diffraction. All six complexes exist in the solid state as monomeric species with terminally bonded trimethylsilylchalcogenolate moieties and a distorted tetrahedral geometry of the zinc center.