Thermochemical studies on 2,4,6-triisopropylbenzophenone and its photo-isomer, 3',5'-diisopropyl-4,4-dimethyl-3-phenyl-1,2-benzocyclobuten-3-ol. Evaluation of magnitude of light energy stored in the latter molecule.
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概要
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Standard energy of combustion and standard enthalpy of sublimation were determined for the title compounds with static bomb combustion calorimetry and with sublimation calorimetry, respectively. Derived standard enthalpies of combustion and of formation at 298.15 K were as follows: <I>ΔH</I>°<SUB>c</SUB>(c)=−(12354.3±1.8), <I>ΔH</I>°<SUB>f</SUB>(c)=−(304.6±3.4), and <I>ΔH</I>°<SUB>f</SUB>(g)=−(189±8) kJ mol<SUP>−1</SUP>, respectively, for 2,4,6-triisopropylbenzophenone(<B>1</B>), and <I>ΔH</I>°<SUB>c</SUB>(c)=−(12440.6±1.6), <I>ΔH</I>°<SUB>f</SUB>(c)=−(218.3±3.3), and <I>ΔH</I>°<SUB>f</SUB>(g)=−(101±10) kJ mol<SUP>−1</SUP>, respectively, for 3′,5′-diisopropyl-4,4-dimethyl-3-phenyl-1,2-benzocyclobuten-3-ol(<B>2</B>). The enthalpy change for the reaction: <B>1</B>(g)→<B>2</B>(g), of 88 kJ mol<SUP>−1</SUP>, which may be supposed to be the magnitude of light energy stored in the latter molecule, has been discussed.
- 公益社団法人 日本化学会の論文
著者
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Matsuura Teruo
Department Of Materials Chemistry Faculty Of Science And Technology Ryukoku University
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Ito Yoshikatsu
Department Of Synthetic Chemistry & Biological Chemistry Graduate School Of Engineering Kyoto Un
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Inagaki Sadayasu
Department of Synthetic Chemistry, Faculty of Engineering, Kyoto University
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Murata Shigeo
Chemical Thermodynamics Laboratory and Department of Chemistry, Faculty of Science, Osaka University
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Sakiyama Minoru
Chemical Thermodynamics Laboratory and Department of Chemistry, Faculty of Science, Osaka University
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Umehara Yasutoshi
Department of Synthetic Chemistry, Faculty of Engineering, Kyoto University
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Hijiya Toyoto
Department of Synthetic Chemistry, Faculty of Engineering, Kyoto University
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