Bulletin of Pure & Applied Sciences- Chemistry
  • Year: 2010
  • Volume: 29c
  • Issue: 1

Kinetics of rhodium(III) -Catalysed oxidation of some aromatic aldehydes by diperiodatocuprate (III) in aqueous alkaline medium

  • Author:
  • M. Ravi Chandar, T. Ravi Prasad1, K. Nagi Reddy2, P. Kondal Reddy3
  • Total Page Count: 10
  • Page Number: 9 to 18

1Director, Dravidian University, Kuppam, Ananthapur Dist. (A.P), India

2Associate Professor, CBIT, Gandipet, Hyderbad. (A.P), India

3Principal, Govt.Degree College, Godavari Khani, Karimnagar Dist. (A.P), India

Department of Metallurgy & Materials Technology, Mahatma Gandhi Institute of Technology, Gandipet, Hyderbad – 500 075 (A.P), India

*Email: rcmaroju@gmail.com

Online published on 22 February, 2013.

Abstract

Rhodium(III)Chloride catalyzed oxidation of some aromatic aldehydes by Diperiodatocuprate(III) (DPC) in aqueous alkaline medium has been studied spectrophotometrically at 414nm. The order in [DPC] is zero and one each in [Rh(III)] and [aldehyde]. No salt effect and [OH −] effect have been found on the rate of oxidation. The stoichiometric studies reveal that one mole of aldehyde consumes two moles of DPC giving the corresponding carboxylic acid as the reaction product. A direct reaction between Rh(III) and aldehyde to give product via hydride ion abstraction by Rh(III) has been proposed.

Keywords

Aromatic aldehydes, Rh(III)-catalysed oxidation, Rh(III)Chloride, DPC, Carboxylic acids, Hydride ion abstraction