112296-19-2Relevant academic research and scientific papers
Coordination chemistry of siloles: Synthesis, reactions, and stereochemistry of silicon-substituted (η4-2,5-diphenylsilacyclopentadiene)transition-metal complexes. Crystal structure of dicarbonyl[phenyl((η 4-exo-1-methyl-2,5-diphenylsilacyclopentadien-1-yl)oxy)carbene]iron
Carre, Francis,Corriu, Robert J. P.,Guerin, Christian,Henner, Bernard J. L.,Wong Chi Man, Wong Wee Choy
, p. 313 - 323 (2008/10/08)
New silicon-monosubstituted and -disubstituted (η4-2,5-diphenylsilacyclopentadiene)transition-metal complexes are described. These complexes undergo a variety of substitution reactions at silicon, in which the exo leaving groups showed enhanced reactivity. The stereochemistry of substitution reactions at silicon with nucleophiles (RMgX, LiAlH4, ROH, H2O) differs significantly from that established for optically active silanes. (η4-1-Chloro-2,5-diphenylsilacyclopentadiene)tricarbonyliron complexes undergo displacement at silicon with complete retention at both exo and endo positions. These observations are discussed in terms of electronic factors. Reactions of the endo-chloro derivative with organolithiums resulted in the formation of new carbene complexes; the crystal structure of dicarbonyl[phenyl((η 4-exo-1-methyl-2,5-diphenylsilacyclopentadien-1-yl)oxy)carbene)iron is reported. In the case of the exo-chloro isomer, the reaction course depends on the nature of the solvent and of the organolithium reagent; either attack at silicon or at a carbonyl ligand was observed.
