Synthesis and Characterization of 1-Transition Metal Complex Substituted-2,3,4,5-Tetraphenyl-1-Silacyclopentadienyl Complexes and Generation of Transition Metal Complex-Substituted Silylene

摘要

New silicon-monosubstituted (ョ 4-2,3,4,5-tetraphenyl-l-silacyclopentadiene)transi tion metal complexes are described. (7-Alkyl-7-silanorbornadienyl)MLn(Alkyl=Methyl: MLn=CpRu(CO)2: Alkyl=Methyl: MLn=CpNi(CO): Alkyl=Ethyl: MLn=CpNi(CO)) complexes were prepared from the corresponding silole-transition metal complexes with dimethylacetylenedicarboxylate. Cycloaddition products were obtained with 2,3-dimethyl-1,3-butadiene, 2,3-butanedione, and 1,4-benzoquinone through the ruthenium-substituted silylene. We have determined the crystal structure of (1-methyl-2,3,4,5-tetraphenyl-l-silacyclopentadien yl)cyclopentadienyldicarbonylruthenium by using graphite monochromated Mo-Ka radiation. The compound was crystallized in the monoclinic space group P21/c with a = 9.838(l), b = 15.972(3), c = 18.327(3) ∈, and モ = 94.28(l)∑. The ruthenium moiety CpRu(CO)2 on silicon is in an axial position.