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Synthesis, Kinetics, and Photochemistry of the Chromium(III) DicyanoaquoEDTA Complex.

ADA124302

Publication Date	1983
Personal Author	Chen, Z.; Cimolino, M.; Adamson, A. W.
Page Count	33
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.
Keywords	Chromium compounds Ethylenediamine Acetates Cyanides Complex compounds Reaction kinetics Hydrates Synthesis(Chemistry) Photochemical reactions Photolysis Organometallic compounds EDTA(Ethylenediaminetetraacetate) Aquation
Source Agency	Non Paid ADAS
NTIS Subject Category	99D - Basic & Synthetic Chemistry 99F - Physical & Theoretical Chemistry
Corporate Authors	University of Southern California, Los Angeles. Dept. of Chemistry.
Document Type	Technical Report
Title Note	Technical rept.
NTIS Issue Number	198312
Contract Number	N00014-76-C-0548

Synthesis, Kinetics, and Photochemistry of the Chromium(III) DicyanoaquoEDTA Complex.

Synthesis, Kinetics, and Photochemistry of the Chromium(III) DicyanoaquoEDTA Complex.
ADA124302

Publication Date	1983
Personal Author	Chen, Z.; Cimolino, M.; Adamson, A. W.
Page Count	33
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.
Keywords	Chromium compounds Ethylenediamine Acetates Cyanides Complex compounds Reaction kinetics Hydrates Synthesis(Chemistry) Photochemical reactions Photolysis Organometallic compounds EDTA(Ethylenediaminetetraacetate) Aquation
Source Agency	Non Paid ADAS
NTIS Subject Category	99D - Basic & Synthetic Chemistry 99F - Physical & Theoretical Chemistry
Corporate Authors	University of Southern California, Los Angeles. Dept. of Chemistry.
Document Type	Technical Report
Title Note	Technical rept.
NTIS Issue Number	198312
Contract Number	N00014-76-C-0548