Transformations of Aryl Isocyanide on Guanidinate-Supported Organozirconium Complexes To Yield Terminal Imido, Iminoacyl, and Enediamido Ligands
作者:Tiow-Gan Ong、Dayna Wood、Glenn P. A. Yap、Darrin S. Richeson
DOI:10.1021/om0108548
日期:2002.1.1
Reactions of aryl isocyanide with bis(guanidinate) Zr(IV) hydrocarbyl complexes are presented. With 1 equiv of Ar'NC the ultimate products are the terminal Zr imido complexes [(R'NR")C(NR)(2)}(2)ZrN(2,6-Me2C6H3)] (3, R = R' = (PR)-P-i, R" = H; 5, R = Pr-i, R' = R" = Me), which are derived via a unique transformation from intermediate eta(2)-iminoacyl species. With 2 equiv of Ar'NC, [(Me2N)C((NPr)-Pr-i)(2)}(2)Zr(eta(2)-Ar'N=CMe)(2)] (6) was isolated. Mild thermolysis of 6 generates an enediamido complex via intramolecular coupling of the iminoacyl groups.