Preparation of mono(dimethylglyoxime)(triphenylphosphine)-halogenocobalt(I) complexes and their application as homogeneous catalysts in reduction of aromatic nitrocompounds

The complexes [Co(I)(DMGH)(PPh 3 )X].C 2 H 5 OH (XCl/Br) have been prepared and characterised by elemental analysis, infrared and electronic spectral studies and magnetic measurements. These compounds have been used as homogeneous catalysts for the reduction of nitrobenzene at atmospheric and highe...

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Bibliographic Details
Published in:Journal of applied chemistry and biotechnology 1977, Vol.27 (2), p.383-388
Main Authors: Datta, Manik C., Saha, Chitta R., Sen, Debabrata
Format: Article
Language:English
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Summary:The complexes [Co(I)(DMGH)(PPh 3 )X].C 2 H 5 OH (XCl/Br) have been prepared and characterised by elemental analysis, infrared and electronic spectral studies and magnetic measurements. These compounds have been used as homogeneous catalysts for the reduction of nitrobenzene at atmospheric and higher pressures. From a study of various operational parameters, it has been observed that the reduction at atmospheric pressure was only possible in a basic ethanolic medium and resulted in 64% of azobenzene on input nitrobenzene basis whereas at higher pressure (4.2 × 10 3 kN/m 2 ), 60% of aniline on the same basis could be obtained in neutral ethanolic medium. The optimum conditions were established both under normal pressure and under high pressure.
ISSN:0375-9210
1935-0554
DOI:10.1002/jctb.5020270202