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2 International Letters of Chemistry, Physics and Astronomy

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Oxidative Decarboxylation and Deamination of Essential Amino Acids by Nicotinium Dichromate – a Kinetic Study

Vivekanandan K., Lakshmi Narayanan R.

International Letters of Chemistry, Physics and Astronomy

2015

Vol. 45

66-72

The oxidation of essential amino acids like valine, leucine, isoleucine, threonine, phenylalanine and histidine using nicotinium dichromate in aqueous medium in presence of perchloric acid at 313 K leads to the formation of corresponding aldehydes. The reaction is first order with respect to nicotinium dichromate, fractional order with respect to amino acids and second order with respect to perchloric acid. Increase in ionic strength by the addition of sodium perchlorate has no effect on the rate constant. There is no polymerization with acrylonitrile. The reaction has been studied at different temperatures and a mechanism confirming to the kinetic observations is suggested.

Infrared and ¹³C NMR spectral studies of some aryl hydrazides: Assessment of substituent effects

Thirunarayanan G., Sekar G. K., Lakshmi Narayanan R.

International Letters of Chemistry, Physics and Astronomy

2014

Vol. 13, iss. 1

88-94

A series of some aryl hydrazides have been synthesized. These hydrazides purities were analyzed by physical constants and spectral data. The assigned spectral group frequencies were correlated with Hammett substituent constants and Swain-Lupton parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the spectral group frequencies has been discussed.