Kinetics and mechanism of acid-induced homolysis of the metal—carbon bond in organocobalt(III) chelates with a tridentate ligand

Autor:	A.N. Kitaigorodskii, M.E. Vol'pin, A. T. Nikitaev, Alexander D. Ryabov, I.Yu. Gromov, V.I. Bakhmutov, I. Ya. Levitin, Anatoly K. Yatsimirsky
Rok vydání:	1985
Předmět:	Stereochemistry Chemistry Ligand Organic Chemistry Kinetics Ethylenediamine Protonation Biochemistry Medicinal chemistry Homolysis Inorganic Chemistry Acid catalysis chemistry.chemical_compound Diamine Materials Chemistry Physical and Theoretical Chemistry Chemical decomposition
Zdroj:	Journal of Organometallic Chemistry. 292:c4-c8
ISSN:	0022-328X
DOI:	10.1016/0022-328x(85)87349-6
Popis:	Kinetics of acid-induced decomposition of the complexes [RCo(7-Me- salen)(en)] + 1 (I), where R = Me, Et and n-Bu, and related equilibria involving protons have been studied. The complexes lose reversibly the diamine ligand at pH of ca. 5–6 to give [RCo(7-Me-salen)(HP42 O) 2 + (II). At much lower pH the latter species undergo fast reversible protonation at the phenolate oxygen to afford [RCo(7-Me-salenH)(H 2 O 2 ] 2+ (III). Both the organometallic intermediates II and III decompose homolytically, the latter being by a factor of 8–400 as reactive as the former. Kinetic data suggest the splitting of the CoC bond to be a rate-limiting step.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4396f2e6bde97912dfbb9e1074d649c1 https://doi.org/10.1016/0022-328x(85)87349-6 Zobrazit plný text záznamu