Homogeneous catalysis of the reduction of nitrobenzene by bromotris(triphenylphosphine) copper (I)

Autor:	M. C. Datta, Debabrata Sen, C.R. Saha
Rok vydání:	2007
Předmět:	Nitrosobenzene Nitrobenzene chemistry.chemical_compound Aniline Azobenzene chemistry Inorganic chemistry General Engineering Dimethylformamide Homogeneous catalysis General Medicine Triphenylphosphine Catalysis
Zdroj:	Journal of Chemical Technology and Biotechnology. 29:88-99
ISSN:	1935-181X 0142-0356
DOI:	10.1002/jctb.503290203
Popis:	Homogeneous reduction of nitrobenzene by hydrogen in presence of complex [CuIBr(PPh3)3] as catalyst has been investigated. From a study of various operational parameters, it has been observed that maximum reduction occurred at 2.5 × 103 kPa pressure and at 473–513 K and resulted in 75% aniline, 10% azobenzene, 2% nitrosobenzene in ethanol, and 70% aniline, 5% azobenzene, 7% nitrosobenzene in dimethylformamide, calculated on the basis of input nitrobenzene. In an attempt to elucidate the reduction mechanism two new intermediates, [CuHPPh3Br]2 (I) and [(C6H5N=NC6H5)Cu2(PPh3)4Br2] (II), have been isolated and characterised by elemental analysis, spectral, thermal, magnetic and p.m.r. studies.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::00e09668623036f36c8a16814c0922fa https://doi.org/10.1002/jctb.503290203 Zobrazit plný text záznamu