title: Effective donor abilities of E-t-Bu and EPh (E = O, S, Se, Te) to a high valent transition metal.
abstract: Amido rotation in the chromium(vi), d(0)-system NCr(NPr(i)2)2X is under investigation as a method for the parameterization of ligands for their donor properties toward high valent metals. In this study, two new series were prepared and studied based on chalcogenide ligands, X = EBu(t) and EPh and where E = O, S, Se, Te; the OPh and SPh compounds were previously reported. The ligand donor parameters for these ligands correlate with the Cr-E-C angles in these chalcogenide series. In addition, it was found that NBO calculated overlaps and DFT calculated bond dissociation enthalpies correlate within X = halide-, EBu(t)- and EPh-series. All of the new complexes were characterized by X-ray diffraction.
authors.affiliation: Michigan State University, Department of Chemistry, 578 S. Shaw Ln, East Lansing, MI 48824, USA. odom@chemistry.msu.edu.
authors.forename: Ross D
authors.initials: RD
authors.lastname: Bemowski
authors.forename: Amrendra K
authors.initials: AK
authors.lastname: Singh
authors.forename: Bailey J
authors.initials: BJ
authors.lastname: Bajorek
authors.forename: Yvonne
authors.initials: Y
authors.lastname: DePorre
authors.forename: Aaron L
authors.initials: AL
authors.lastname: Odom