C-H BOND ACTIVATION BY COBALT(I) MACROCYCLES - RAPID H D EXCHANGE BETWEEN MACROCYCLE AND ACETONITRILE SOLVENT/

Authors
FUJITA E CREUTZ C
Citation
E. Fujita et C. Creutz, C-H BOND ACTIVATION BY COBALT(I) MACROCYCLES - RAPID H D EXCHANGE BETWEEN MACROCYCLE AND ACETONITRILE SOLVENT/, Inorganic chemistry, 33(8), 1994, pp. 1729-1730
Citations number
33
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Inorganic chemistry → ACNP
ISSN journal
00201669
Volume
33
Issue
8
Year of publication
1994
Pages
1729 - 1730
Database
ISI
SICI code
0020-1669(1994)33:8<1729:CBABCM>2.0.ZU;2-V
Abstract
FT-IR and H-1 NMR spectra of CoL+ (L = methyl-1,4,8,11-tetraazacyclote tradeca-4,11-diene) in CD3CN indicate rapid H/D exchange of the deuter ated solvent with the macrocycle amine protons (rate constant (5 +/- 1 ) X 10(-4) s-1 at (23 +/- 1) degrees-C) and slower exchange with the p rotons of the imine methyl and the methylene adjacent to the imine car bon atoms (marked with an asterisk in the figure); the process is anom alously rapid for ''simple'' proton transfer and signals reactivity of the metal center toward C-H activation.