title: Using sterics to promote reactivity in fac-Re(CO)3 complexes of some 'non-innocent' NNN-pincer ligands.
abstract: 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.
authors: Department of Chemistry, Marquette University, Milwaukee, WI 53201-1881, USA.
authors: Sarath
authors: S
authors: Wanniarachchi
authors: Brendan J
authors: BJ
authors: Liddle
authors: John
authors: J
authors: Toussaint
authors: Sergey V
authors: SV
authors: Lindeman
authors: Brian
authors: B
authors: Bennett
authors: James R
authors: JR
authors: Gardinier
mesh_terms: D000588:Amines / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D011720:Pyrazoles / Q000737:chemistry; D012211:Rhenium / Q000737:chemistry*
chemical_list: D000588:Amines; D008024:Ligands; D009942:Organometallic Compounds; D011720:Pyrazoles; D012211:Rhenium