| Abstract: | Dimeric Dialkylphosphanylgermylenes: Ylidic Diphosphadigermetanes The dichlorogermylene triphenylphosphane complex ( 1 ) reacts with di-t-butyl(trimethylsilyl)phosphane ( 2 a ) only in a 1 : 1 stoichiometry providing dimeric chloro(di-t-butylphosphanyl)germylene ( 3 a ); with two equivalents of diisopropyl(trimethylsilyl)phosphane ( 2 b ), however, 1 (or the dichlorogermylene dioxane complex) provide straightforwardly dimeric bis(diisopropylphosphanyl)germylene ( 5 b ) as yellow crystals. The trans-dimeric structures of 3 a and 5 b are confirmed by spectroscopic data and by X-ray diffraction. Dialkylphosphanylgermylenes 3 a and 5 b are ylide-type diphosphadigermetanes in solution and in the solid state. |
