The Structures and Thermal Behaviors of Bivalent Metal Succinates in the Solid State
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概要
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The relations between the structures and thermal behaviors of the succinates of Mg(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and Pb(II) were studied. In the case of the copper salt, the dehydration of its dihydrate began easily at room temperature. However, the tetrahydrates of Mg, Co, and Ni held their waters more tightly, and changed from crystalline to amorphous state in the course of dehydration which began at 50–60 °C. The anhydrous salts of Mg and Co recrystallized at 306 and 272 °C, respectively, with a sharp exotherm on each DTA curve. The cobalt salt showed stepwise color changes, pink \xrightarrowdehydration bluish violet \xrightarrowrecrystalllzation pink. PbC<SUB>4</SUB>H<SUB>4</SUB>O<SUB>4</SUB> exhibited a phase transition from tetragonal to cubic at 160 °C with <I>ΔH</I>=2.5 kJ/mol and <I>ΔS</I>=5.9 J/deg·mol. The phase transition was reversible and seems to be accompanied with a conformational change of the succinate ion.
- 公益社団法人 日本化学会の論文
著者
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Sone Kozo
Department Of Chemistry Faculty Of Science Josai University
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Muraishi Kazuo
Department of Chemistry, Faculty of Science, Yamagata University
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Nagase Kenzo
College of General Education, Tohoku University
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Yokobayashi Hiroko
College of General Education, Tohoku University
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