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- Motoharu Tanaka
- Department of Chemistry, Faculty of Science, Nagoya University
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- Hiroyasu Nomura
- Department of Chemical Engineering, School of Engineering, Nagoya University
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- Fumio Kawaizumi
- Institute for Molecular Science
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説明
<jats:title>Abstract</jats:title> <jats:p>A method is proposed for evaluating the ΔH° value for the proton dissociation of an acid HB from the temperature dependence of the dissociation constant Ka: Instead of differentiating the pKa (= −log Ka) value of acid HB with respect to temperature, we select an appropriate acid HA as a reference and plot the quantity X = pKa(HB)−pKa(HA) as a function of reciprocal temperature. The plot was found to be linear with sufficient accuracy for most non-charged or negatively charged acids, for which pKa itself is a complex function of temperature. ΔH° values are thus readily evaluated by linear least-squares fitting. The theoretical background is discussed.</jats:p>
収録刊行物
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- Bulletin of the Chemical Society of Japan
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Bulletin of the Chemical Society of Japan 65 (2), 410-414, 1992-02-01
Oxford University Press (OUP)
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詳細情報 詳細情報について
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- CRID
- 1360283694080499712
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- NII論文ID
- 130004147573
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- ISSN
- 13480634
- 00092673
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- データソース種別
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