On the mechanism of the chromium carbonyl photocatalyzed watergas shift reaction |
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| Authors: | Herbert Nagorski Manfred J. Mirbach Marlis F. Mirbach |
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| Affiliation: | Chemische Fabrik Stockhausen GmbH, Bäkerpfad 25. D-4150 Krefeld F.R.G.;University of Petroleum & Minerals, Department of Chemistry, Dhahran 31261 Saudi Arabia;Gmelin - Institut der Max - Planck - Gesellschaft, Varretrappstr. 40-42. D-6000 Frankfurt 90 F.R.G. |
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| Abstract: | The chromium hexacarbonyl catalyzed watergas shift reaction is accelerated by UV irradiation and inhibited by increased CO pressure. An activation energy of 30 kJ mol?1 has been determined for the photochemical and one of 145 kJ mol?1 for the thermal reaction. Light accelerates the conversion of Cr(CO)6 into [Cr(CO)5 formate]?, which is thermally activated, as evidenced by in situ IR and UV spectroscopy. |
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