EPR Studies of solvent coordination in bis(dimethylglyoxime)cobaltII complexes as catalysts for hydrogenation of nitrobenzene

Autor:	M. Kwieciński, Antal Rockenbauer, Stanisław Tyrlik, Miklos Gyor
Rok vydání:	1982
Předmět:	Hydrogen chemistry.chemical_element Hydrogen transfer Photochemistry Spectral line law.invention Catalysis Inorganic Chemistry Solvent Nitrobenzene chemistry.chemical_compound Dimethylglyoxime chemistry law Materials Chemistry Physical and Theoretical Chemistry Electron paramagnetic resonance
Zdroj:	Inorganica Chimica Acta. 58:237-242
ISSN:	0020-1693
DOI:	10.1016/s0020-1693(00)90252-4
Popis:	EPR spectra of diaquocobaloxime and dimorpholine cobaloxime in different solvents have been studied in frozen solutions. It has been observed that magnetic parameters for solvent complexed cobaloximes depend strongly on the nature of the solvent, whereas morpholine-complexed cobaloxime shows no substantial variation of magnetic parameters with the solvents. The rates of nitrobenzene hydrogenation catalyzed by cobaloximes show considerable variation with solvent. It has been concluded that three elementary processes important for catalysis: hydrogen and nitrobenzene activation as well as hydrogen transfer, take place in the region of the active complex remote from the z axis.
Databáze:	OpenAIRE
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