Electron Density Modulation of Catalytic Metal Centers by Substituted Aryl-Isocyanide Ligands.

摘要

In this work several substituted-aryl-isocyanide ligands were synthesized. The corresponding isocyanidepentacarbonyl chromium complexes were synthesized photolytically to evaluate the electronic properties of the isocyanide ligands. The chromium compounds were characterized by elemental analysis, infrared, 1H and 13C NMR, and cyclic voltammetry. The infrared and 13C NMR data contained only small differents between all the investigated ligands. This result indicated that only small perturbations in the electron density at the metal center had occurred. The cyclic voltammetry data had a larger variation with a oxidation potential range of 106mV. This range could prove to be important if a catalytic cycle of interest included an oxidative procell. To completely determine the potential utility of these ligands more work needs to be done. (JES)