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首页> 外文期刊>Journal of Physical Chemistry & Biophysics >Studies of Solvent Effect of Aquo-Methanol Solvent System on Kineticsand Activation Parameters of Base Catalised Hydrolysis of EthylCinnamate
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Studies of Solvent Effect of Aquo-Methanol Solvent System on Kineticsand Activation Parameters of Base Catalised Hydrolysis of EthylCinnamate

机译：水-甲醇溶剂体系对肉桂酸乙酯碱催化水解反应动力学及活化参数的影响研究

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The solvent effect of ethanol on the alkali catalyzed solvolysis reaction was studied by carring out of the hydrolysis of ester namely ethyl cinnamate in water-methanol media of varying composition consisting of 30 to 70% of methanol (v/v) at different Temperature ranging from 20°C to 70°C. The Specific rate constant values of the reaction were found to depleted with increasing concentration of methanol in reaction media. Enhancement in ΔG* with simultaneous depletion in ΔH* and ΔS* of the reaction, it has been concluded that reaction is enthalpy stimulating and entropy inhibiting and specific salvation take place in water- methanol media. From the evaluated value of Iso kinetic temperature, which is less than 300 indicates that this reaction in water-methanol media obey Barclay-Butler rule and there is weak but considerable solvent –solute interaction taking place in reaction media.
机译：研究了乙醇对碱催化溶剂分解反应的溶剂作用，方法是在不同温度下，由30％至70％的甲醇（v / v）组成的水-甲醇介质中，进行酯水解，即肉桂酸乙酯的水解。 20°C至70°C。发现反应的比速率常数值随着反应介质中甲醇浓度的增加而减少。随着反应的ΔH*和ΔS*的同时耗尽，ΔG*增强，已得出结论，该反应是焓刺激和熵抑制，并且在水-甲醇介质中发生了特定的挽救作用。根据Iso动力学温度的评估值（小于300），表明该反应在水-甲醇介质中服从Barclay-Butler规则，并且在反应介质中发生的微弱但相当大的溶剂-溶质相互作用。

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