Synthesis, Kinetics, and Photochemistry of the Chromium(III) DicyanoaquoEDTA Complex.
Abstract
The complex Cr(Y)(CN)2(H2O)(3-) resembles the various cyano-aquo and cyano-amine complexes of Cr(III) in that the thermal reaction is one of cyanide aquation, the rate increasing with decreasing pH. Unlike the other cases, however, there does not appear to be appreciable contribution to the rate from a path involving -CrCNH. It is possible that the aquation is assisted by internal protonation of a cyano groupd through hydrogen boding from a non-coordinated but protonated carboxyl group. While the cyano-ammine complexes show primarily ammonia photoaquation, the photochemistry of our complex is one of cyanide aquation only. A likely explanation, however, is that labilization of other ligands is either blocked, or if it does occur, is unobservable under our conditions. Both the quantum yield behavior and the emission behavior are consistent with the photolysis and emission rules proposed for Cr(III) complexes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1983
- Accession Number
- ADA124302
Entities
People
- Arthur W. Adamson
- Marc Cimolino
- Zhong Chen
Organizations
- University of Southern California