Vanishing microwave effects: influence of heterogeneity

…, J Meuldijk, JAJM Vekemans, LA Hulshof

Index: Dressen, Mark H. C. L.; Van De Kruijs, Bastiaan H. P.; Meuldijk, Jan; Vekemans, Jef A. J. M.; Hulshof, Lumbertus A. Organic Process Research and Development, 2007 , vol. 11, # 5 p. 865 - 869

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Citation Number: 50

Abstract

A consistent setup of experiments has been conducted to demonstrate an enhanced reaction rate under microwave irradiation as compared to conventional heating, ie a real microwave effect. It was found that addition of a cosolvent, diminishing the heterogeneous character of the reaction mixture, greatly reduced the microwave effect. This was demonstrated by two examples; selective mono-urea formation and racemization of an N- ...