Various osmium species (e.g. Na2[Os10C(CO) 24], OsCl3·nH2O and [Os(CO) 3Cl2]2) are able to activate acetonitrile towards nucleophilic attack by water to give acetamide. The most efficient catalyst appears to be [Os(CO)3Cl2]2, which gives good yields of acetamide by working in air at 76 °C. An increase of the quantity of water has a positive effect on yields, a plateau being reached with a molar ratio H2O:CH3CN of about 7.3:1. The catalytic activity of the osmium species decreases with prolonged heating, due to the progressive partial decarbonylation of fac-tricarbonylosmium(II) species. The complex [Ru(CO)3Cl2]2 is much less efficient than its osmium analogue due to its easy conversion in [Ru(CO) 2Cl2(CH3CN)2] under the reaction conditions.

Efficient catalytic hydration of acetonitrile to acetamide using [Os(CO)3CI2]2 / E. Cariati, C. Dragonetti, L. Manassero, D.M. Roberto, F. Tessore, E. Lucenti. - In: JOURNAL OF MOLECULAR CATALYSIS. A: CHEMICAL. - ISSN 1381-1169. - 204-205(2003), pp. 279-285.

Efficient catalytic hydration of acetonitrile to acetamide using [Os(CO)3CI2]2

E. Cariati
Primo
;
C. Dragonetti
Secondo
;
L. Manassero;D.M. Roberto;F. Tessore
Penultimo
;
2003

Abstract

Various osmium species (e.g. Na2[Os10C(CO) 24], OsCl3·nH2O and [Os(CO) 3Cl2]2) are able to activate acetonitrile towards nucleophilic attack by water to give acetamide. The most efficient catalyst appears to be [Os(CO)3Cl2]2, which gives good yields of acetamide by working in air at 76 °C. An increase of the quantity of water has a positive effect on yields, a plateau being reached with a molar ratio H2O:CH3CN of about 7.3:1. The catalytic activity of the osmium species decreases with prolonged heating, due to the progressive partial decarbonylation of fac-tricarbonylosmium(II) species. The complex [Ru(CO)3Cl2]2 is much less efficient than its osmium analogue due to its easy conversion in [Ru(CO) 2Cl2(CH3CN)2] under the reaction conditions.
Settore CHIM/03 - Chimica Generale e Inorganica
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/182428
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