Iridium Phosphinidene Complexes: A Comparison with Iridium Imido Complexes in Their Reaction with Isocyanides
作者:Halil Aktas、Jos Mulder、Frans J. J. de Kanter、J. Chris Slootweg、Marius Schakel、Andreas W. Ehlers、Martin Lutz、Anthony L. Spek、Koop Lammertsma
DOI:10.1021/ja9048509
日期:2009.9.23
18-Electron nucleophilic, Schrock-type phosphinidene complexes 3 [Cp*(Xy-N C)Ir PAr] (Ar = Mes*, Dmp, Mes) are capable of unprecedented [1 + 2]-cycloadditions with 1 equiv of isocyanide RNC (R = Xy, Ph) to give novel inclaphosphirane complexes [Cp*(Xy-N C)IrPArC=NR]. Their structures were ascertained by X-ray diffraction. Density functional theory investigations on model structures revealed that the iridaphosphirane complexes are formed from the addition of the isocyanicle to 16-electron species [Cp*Ir=PAr] forming first complex 3 that subsequently reacts with another isocyanicle to give the products following a different pathway than its nitrogen analogue [Cp*Ir Nt-Bu] 1.