Studies on the reduction of nitrobenzene to aniline catalysed by pd(acac)2-pyridine system

✍ Scribed by Datta, Manik C. ;Saha, Chitta R. ;Sen, Debabrata

• Publisher: Blackwell Publishing
• Year: 1978
• Tongue: English
• Weight: 505 KB
• Volume: 28
• Category: Article
• ISSN: 0142-0356
• DOI: 10.1002/jctb.5700281103

✦ Synopsis

Abstract

The complex, bis(acetylacetonato)palladium(II) in pyridine, is used as a homogeneous catalyst for the conversion of nitrobenzene to aniline. From a study of various operational parameters the optimum reduction was found to occur at 1 atm pressure and at room temperature in petroleum ether (b.p. 100–120°C) solvent, yielding 90% of aniline on input nitrobenzene basis. The complex [Pd^11^(acac)H(C~6~H~5~NO~2~)Py] was isolated under similar experimental conditions and was characterised by elemental analysis, magnetic, thermal and spectral studies. Formation of a phenylnitrene metal complex has been suggested as a hypothetical intermediate in the reduction process.