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Satyanarayana P.V.V.,Acharya Nagarjuna University | HariBabu B.,Acharya Nagarjuna University | Bhagya Lakshmi K.,Government College for Womens
Rasayan Journal of Chemistry | Year: 2011

The oxidation kinetics of some alkyl phenyl Sulfides with Cetyltrimethylammonium dichromate(CTADC) as oxidizing agent was investigated in dichloromethane-acetic acid(80:20, V/V) at 30°C and in aqueous acetic acid(60:40,50:50,V/V) at 30, 40 & 50°C. The oxidation of alkyl Phenyl Sulfides followed a over all second order kinetics, first order each with respect to substrate and CTADC. It was found mat the rate of reaction increases with electron donating power of the alkyl groups. A possible mechanism was also suggested for the oxidation process. © 2011 RASAYAN. All rights reserved. Source

Reddy M.S.,Bangalore University | Gowda V.C.V.,Government College for Womens | Reddy C.N.,Maharanis Science College for Woman
AIP Conference Proceedings | Year: 2011

Elastic properties of xLi 2SO 4-16Li 2O-(84-x)[0.7B 2O 3-0.3V 2O 5] where (5≤x≥30) glasses have been prepared by melt quenching method and structural investigations were carried out using ultrasonic pulse echo overlap technique at a frequency of 10 MHz and at 300 K. The molar volume increases and the density decreases with the increase of Li 2SO 4 concentration due to the incorporation of SO 4 2- ions into the modified macromolecular network. The addition of Li 2SO 4 content leads to loose packing structure which is attributed to volume increasing effect and the reduction in the vibrations of borate and vanadate lattices. Increase in Li 2 SO 4 results in decreasing cross link density which in turn decreases elastic moduli. The results are discussed in view of its network structure. The structural groups [VOO 3/2] 0 and [BO 3/2] 0 modify preferentially. This preference in modification is decided by the electronegativity (χ) of the structural groups. © 2011 American Institute of Physics. Source

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