http://nopr.niscair.res.in/handle/123456789/2070 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/2114 Title: Viscosity prediction for R32 and R143a at moderate density regimes via semi-empirically based assessment <br/> <br/>Authors: Haghighi, Behzad; Heidari, Fatemeh; Papari, Mohammad Mehdi <br/> <br/>Abstract: An efficient procedure for calculating transport properties, especially viscosity, at zero density is presented. The extended corresponding states approach of Huber et al. [Huber M L, Laesecke A & Perkins R A, Ind Eng Chem Res, 42 (2003) 3163] has been used for evaluating the viscosity coefficients for gaseous state of R32 and R143a in moderate-density regime. The Lennard-Jones 12-6 (LJ 12-6) potential energy function has been used as the initial model potential required by the technique. The interaction potential energies from the inversion procedure reproduce the viscosity within the uncertainty of the best measurements. <br/> <br/>Page(s): 867-874 http://nopr.niscair.res.in/handle/123456789/2113 Title: Solvent effects and solvation models in the allylation of 2-mercaptobenzimidazole <br/> <br/>Authors: Devender, T; Bharathi, D Vijaya; Manikyamba, P <br/> <br/>Abstract: The second order rate constants of allylation of 2-mercaptobenzimidazole are obtained conductometrically in different protic and aprotic solvents in the temperature range 303-318K. Linear multiple regression analysis results in the LSER log kII = –8.633 + 11.032Y + 6.958P + 0.189⍺ (n = 11, R = 0.931), suggesting that the transition state is more solvated than the reactants due to polarity, polarisability and hydrogen bond donor ability of the solvent. <br/> <br/>Page(s): 863-866 http://nopr.niscair.res.in/handle/123456789/2112 Title: Kinetics and mechanism of electron transfer reactions: Oxidation of glyoxylic acid by peroxomonophosphoric acid in acid perchlorate medium <br/> <br/>Authors: Vijai, N; Mala, D; Khandelwal, C L; Sharma, P D <br/> <br/>Abstract: The kinetics of oxidation of glyoxylic acid by peroxomono-phosphoric acid in acidic medium is reported here. The stoichiometry corresponds to the reaction of one mole of peroxomonophosphate for one mole of glyoxylic acid. The reaction is second order (first order with respect to each reactant). The suggested rate law corresponds to the plausible reaction mechanism. <br/> <br/>Page(s): 859-862 http://nopr.niscair.res.in/handle/123456789/2111 Title: Synthesis of organoheterobimetallic [Bu₂Sn(IV)-Ti(IV)]-μ-oxoisopropoxide and its β-diketonates <br/> <br/>Authors: Sharma, H K; Kumar, Rajesh <br/> <br/>Abstract: A new organoheterobimetallic-μ-oxoisopropoxide of the type [Bu₂SnO₂Ti₂(OPri)₆] has been synthesized by the thermal condensation of dibutyltin diacetate and titanium isopropoxide in 1:2 molar ratio in refluxing xylene. The isopropoxy substitution reactions of this μ-oxoisopropoxide compound with β-diketones in different molar ratios (1:1-1:4) gives compounds of the type [Bu₂SnO₂Ti₂(OPri)₆₋ոLո] (where n is 1-4 and L = acetylacetonate/ benzoylacetonate anion) respectively. The μ-oxoisopropoxide compound has been characterized by elemental, spectral analysis (IR, ¹H , ¹³C, ¹¹⁹Sn NMR and mass) and molecular weight data. The β-diketonates of [Bu₂SnO₂Ti₂(OPri)₆] have been characterized by elemental, liberated isopropanol and spectral analysis (IR, ¹H , ¹³C NMR). <br/> <br/>Page(s): 854-858