Formation and properties of Ziegler systems based on nickel bis(dimethylglyoximate) in catalysis of hydrogenation reactions

The effect of the nature of the acidoligand in the nickel precursor on the activity of Ziegler systems in hydrogenation of alkenes was characterized qualitatively. The key steps of the reaction of nickel bis (dimethylglyoximate) with triethylaluminum determined by the methods of IR, NMR, and ESR spe...

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Bibliographic Details
Published in:Russian journal of general chemistry 2014-12, Vol.84 (12), p.2413-2420
Main Authors: Titova, Yu. Yu, Belykh, L. B., Shmidt, F. K.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
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Summary:The effect of the nature of the acidoligand in the nickel precursor on the activity of Ziegler systems in hydrogenation of alkenes was characterized qualitatively. The key steps of the reaction of nickel bis (dimethylglyoximate) with triethylaluminum determined by the methods of IR, NMR, and ESR spectroscopy include the reaction between AlEt 3 and the OH group of the dimethylglyoximate ligand, formation of the product of C-alkylation as a result of addition of AlEt 3 to the C=N bond, and the reduction of Ni(II) to Ni(0) complexes. The absence of nickel clusters and a low concentration of coordinatively unsaturated Ni(0) complexes is the most probable reason of low catalytic activity of the studied system in hydrogenation catalysis.
ISSN:1070-3632
1608-3350
DOI:10.1134/S1070363214120111