Facile Regeneration of Carboxyl Compounds from Thiosemicarbazones by Manganese (III) Acetate

K. R. Sankaran* and C. Anbuselvan

Department of Chemistry, Annamalai University, Annamalainagar. 608 002 India.

ABSTRACT:

The kinetics of manganese (II) triacetate dihydrate oxidation of thiosemicabazones of benzaldehyde and acetophenone have been studied in 90% acetic acid at 30 ± 0.20C. The reaction exhibits total second order kinetics - first order in each reactant. The rates of these reactions are susceptible to electronic influences of substituents on the phenyl ring. To account for the negative Hammett reaction constant (P = -2.15) in the case of acetophenone and substituted acetophenones. a rate determining cleavage of N-Mn" bond has been proposed. At ambient temperature manganese (III) acetate regenerates the corresponding carbonyl compounds in about 86% yield.

KEYWORDS:

Thiosemicabazones; benzaldehyde; acetophenones carbonyl

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Copy the following to cite this article: Sankaran K. R, Anbuselvan C. Facile Regeneration of Carboxyl Compounds from Thiosemicarbazones by Manganese (III) Acetate. Orient J Chem 1998;14(2).

Copy the following to cite this URL: Sankaran K. R, Anbuselvan C. Facile Regeneration of Carboxyl Compounds from Thiosemicarbazones by Manganese (III) Acetate. Orient J Chem 1998;14(2). Available from: http://www.orientjchem.org/?p=22128