Ligand dissociation from mono-substituted derivatives of hexacarbonylchromium (Cr(CO)5L, L  P(C6H5)3, P(C4H9)3, P(OCH3)3, P(OC6H5)3, and As(C6H5)3)

Autor:	Michael J. Wovkulich, Jim D. Atwood
Rok vydání:	1980
Předmět:	Inorganic Chemistry Crystallography Lability Chemistry Organic Chemistry Materials Chemistry Physical and Theoretical Chemistry Ligand (biochemistry) Biochemistry Dissociation (chemistry) Equilibrium constant
Zdroj:	Journal of Organometallic Chemistry. 184:77-89
ISSN:	0022-328X
DOI:	10.1016/s0022-328x(00)94365-1
Popis:	The rates of dissociation of the unique ligand from Cr(CO)5L have been determined from L  P(C6H5)3, P(OC6H5)3, P(OCH3)3, and As(C6H5)3 by reaction with CO. The reactions were investigated from 80140°C and activation parameters were determined. The rate data were fully consistent with rate-determining dissociation of the ligand L. The order of ligand lability is As(C6H5)3 > P(C6H5)3 > P(OC6H5)3 > P(OCH3)3. For L  P(C4H9)3 an equilibrium was observed and the equilibrium constant evaluated at 140 and 170°C. The equilibrium greatly favors Cr(CO)5P(C4H9)3 as the product. These studies allow the ligand binding to be compared quantitatively for these complexes. An activation of the CrP bond by room light has been noted.
Databáze:	OpenAIRE
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