Using sterics to promote reactivity in fac-Re(CO)3 complexes of some ‘non-innocent’ NNN-pincer ligands
作者:Sarath Wanniarachchi、Brendan J. Liddle、John Toussaint、Sergey V. Lindeman、Brian Bennett、James R. Gardinier
DOI:10.1039/c1dt10030k
日期:——
Two new redox active ligands based on di(2-(3-organopyrazolyl)-p-tolyl)amine have been prepared in order to investigate potential effects of steric bulk on the structures, electronic properties, or reactivity of tricarbonylrhenium(I) complexes. Replacing the hydrogens at the 3-pyrazolyl positions with alkyl groups causes significant distortion to the ligand framework due to potential interactions between these groups when bound to a fac-Re(CO)3 moiety. The distortions effectively increase the nucleophilic character of the central amino nitrogen and ligand-centered reactivity of the metal complexes.