New Sterically Congested Organoselenium and Tellurium Compounds

Abstract

Abstract The report on recent preparative, n.m.r. spectroscopic and structural results concerning steric effects in organoselenium and -tellurium chemistry covers: 1. extremely bulky ditellurides and diselenides, including rotational barriers and unusual conformations, 2. bulky metal arylselenelolates and tellurolates, including compounds with bonds from Se or Te to Li, Na, K, Si, Ge, Sn, Zn, Cd, Hg and Au, 3. steric effects on silyltelluride/acyl halide and silylphosphane/tellurium reactions, 4. reaction of various diselenides and ditellurides with iodine and bromine, including iodine catalysis of Se-Se bond cleavage/bond formation equilibria.