Permethylheteroatomcyclopolysilane mit Heteroatomen der VI. Hauptgruppe. Darstellung und spektroskopische Eigenschaften

Article abstract of DOI:10.1016/0022-328X(92)83280-U

Group VI permethylheterocyclopolysilanes (SiMe2)n X with n = 4,5,6 and X = O, S, Se have been synthesized from α,ω-dichloropolysilanes and Li2S/Li2Se or by simple hydrolysis.From UV spectroscopic results considerable contributions of the heteroatom lone pair electrons to low-energy electron transitions can be derived.Si-Si NMR coupling constants satisfactorily correlate with heteroatom electronegativities, indicating dominant Fermi contact contributions to the magnitude of the corresponding coupling constants.