| 氨基苯甲酸异构体在水-乙醇混合溶剂中的离解焓和熵 |
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| 引用本文： | 陈树大,胡新根,潘富敏,林瑞森,方文军. 氨基苯甲酸异构体在水-乙醇混合溶剂中的离解焓和熵[J]. 化学学报, 2001, 59(7): 1089-1095 |
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| 作者姓名： | 陈树大 胡新根 潘富敏 林瑞森 方文军 |
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| 作者单位： | 浙江嘉兴学院化工系;浙江大学化学系.杭州(310027) |
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| 基金项目： | 国家自然科学基金(20073039)资助项目 |
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| 摘 要： | 利用流动混合微量热法测定298.15K时单取代氨基苯甲酸邻，间，对三个异构体在水-乙醇混合溶剂中两个官能团分步离解的离解焓，结合相应的Gibbs自由能数据计算离解熵，从溶剂效应和取代基位置效应探讨其离解热力学行为。
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| 关 键 词： | 氨基苯甲酸 苯甲酸P 异构体 微量热法 热力学 离解热 离解焓 离解熵 |
| 修稿时间： | 2001-01-15 |
Dissociation enthalpies and entropies of amino benzoic acids in water-ethanol mixtures |
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| Chen Shuda,Hu Xingen,Pan Fumin,Lin Ruisen,Fang Wenjun. Dissociation enthalpies and entropies of amino benzoic acids in water-ethanol mixtures[J]. Acta Chimica Sinica, 2001, 59(7): 1089-1095 |
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| Authors: | Chen Shuda Hu Xingen Pan Fumin Lin Ruisen Fang Wenjun |
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| Affiliation: | Zhejiang Univ, Dept Chem.Hangzhou(310027) |
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| Abstract: | The dissociation enthalpies of 0 - , m -, p - amino benzoic acid in water-ethanol mixtures ranging from pure water up to 0.477 molar fraction of ethano have been determined at 298.15K by the method of mixing-flow microcalorimetry. Combined with the available values of Gibbs free energy reported in the literature, the corresponding values of dissociation entropy were calculated. The enthalpic and entropic effects arising form solvent and substituent are discussed in terms of solute-solvent interaction and tautomeric equilibrium. |
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| Keywords: | AMINOBENOIC ACID BENZENECARBOXYLIC ACID P ISOMER MICROCALORIMETRIC METHOD THERMODYNAMICS HEAT OF DISSOCIATION |
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