Ketene organoelement derivatives. Synthesis of bis(l-R-2-oxovinyl)silanes and germanes (R = SiMe3, GeMe3, SnMe3)

Abstract

Earlier unknown 1,3 bisketene organoelement derivatives RMeE(C(E´Me 3 )=C=O) 2 (E = Si, Ge; E´ = Si, Ge, Sn) have been synthesized by the reaction of bis(alkoxyethynyl)silanes and germanes with Me 3 E´Hal. Bis(1 trimethylsilyl 2 oxovinyl)silane is also formed by the reaction of trimethylsilyl and (dimethylsilylene)bisketenes with dimethylsilylene bistriflate and trimethylsilyl triflate, respectively. Addition of nucleophiles to the ketene fragment of compounds synthesized has been studied.