J C Kuriacose
Articles written in Journal of Chemical Sciences
Volume 89 Issue 3 June 1980 pp 235-239 Physical and Theoretical
Oscillations in the bromate-Mn(II)-organic substrate system are studied by following the concentrations of Mn(III) and Br2 spectrophotometrically, apart from monitoring the concentration of Br- by potentiometry. Limit cycles for the Mn(III)-Br2 combination are constructed experimentally and theoretically. The experimental results agree with the theoretical expectations based on a suggested mechanism.
Volume 93 Issue 1 January 1984 pp 47-52 Organic
Rate constants for the reaction of carbonate radical with aniline and some parasubstituted anilines have been determined by the flash photolysis technique. Using σ+ para values the rate constants at pH 8.5 correlate very well with the Hammett equation yielding ρ
Volume 93 Issue 2 March 1984 pp 73-81 Physical and Theoretical
The influence of varying concentrations of Co(
Volume 93 Issue 3 April 1984 pp 357-372 Solid Statet Chemistry and Surface Chemistry
Some of the mechanistic studies on dehydrogenation, dehydration and decarboxylation over metal oxide catalysts are reviewed. The type of activity of a catalyst is determined by the nature of the surface-substrate interaction, the same catalyst giving rise to different relative activities depending on the substrate. In addition to dehydrogenation and dehydration reactions many oxide catalysts promote hydrogen transfer reactions too. In the mixed oxide systems the interfaces between the pure oxides as well as interfaces arising from new phases formed by the interaction of component oxides are active regions. In the ketonization of acids the same active sites as those effective for the decomposition of alcohols are involved. The type of the intermediate depends on the conditions of reaction, the most important being the temperature. The technique of competitive reactions has been used to establish that the catalytic ketonization is a bimolecular process on the surface of the catalyst.
Volume 95 Issue 5-6 December 1985 pp 573-578 Inorganic and Analytical
Ruthenium(III) catalysed oxidation of 1-phenylethanol and substituted 1-phenylethanols by phenyliodosoacetate (
Volume 97 Issue 2 September 1986 pp 125-132 Inorganic and Analytical
Catalytic amounts of RuCl2(PPh3)3 in the presence of excess of N-methylmorpholine N-oxide (NMO) in DMF, oxidizes secondary alcohols to ketones. Spectral and electrochemical studies reveal the formation of an oxocomplex of Ru(IV), on adding excess of NMO. In the proposed mechanism, the Ru(IV)-oxo complex formed from Ru(II) and NMO, attacks the substrate in the rate determining step.
Volume 97 Issue 5-6 December 1986 pp 573-580 Physical and Theoretical
Rate constants for the reaction of phosphate radical with some aromatic and aliphatic amines have been determined by the flash photolysis technique. The products formed under conditions of continuous irradiation have been identified. In the case of an aromatic amine the major product is the azo compound while in the case of an aliphatic amine a carbonyl compound is formed.
Volume 100 Issue 1 February 1988 pp 13-20 Inorganic and Analytical
The selective oxidation of thioethers to sulphoxides and of PPh3 to PPh3O can be effected by NMO in DMF as solvent in the presence of Ru(III) chloride as catalyst. Kinetic investigations indicate that the orders with respect to the catalyst and oxidant are one each. The order with respect to the substrate is variable being fractional order at low concentrations and zero at high concentrations. Spectrophotometric studies reveal the formation of a 1:1 complex between the substrate and the catalyst. A mechanism consistent with the above observations has been proposed and verified.
Volume 100 Issue 4 August 1988 pp 297-303 Physical and Theoretical
The borate radical is produced by the flash photolysis of an aqueous alkaline solution of NaBO2 and K2S2O8. The absorption spectrum of the transient borate radical shows two maxima. The self decay of this radical is second order. Rate constants for the reactions of this radical with some organic substrates have been determined.
Volume 134, 2022
Continuous Article Publishing mode
Click here for Editorial Note on CAP Mode