An oxygen exchange of arsenate and alkylarsonate ions with water.
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概要
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The oxygen exchange rates, <I>R</I>′s, between the alkylarsonates (methyl- and butyl-) and water were measured over the pH range greater than 9 and at 30 °C. The rates were analyzed in terms of the rate law, <I>R</I>=<I>k</I><SUB>1</SUB>[R′-AsO<SUB>3</SUB>H<SUP>−</SUP>]+<I>k</I><SUB>2</SUB>[R′-AsO<SUB>3</SUB><SUP>2−</SUP>] (R′-; alkyl-) to obtain <I>k</I><SUB>1</SUB> to be 6.64×10<SUP>−4</SUP> s<SUP>−1</SUP> for methyl- and 4.38×10<SUP>−4</SUP> s<SUP>−1</SUP> for butylarsonate ions, respectively. The first-order oxygen exchange rate constants, <I>k</I><SUB>1</SUB>'s, on the alkylarsonate univalent anions (methyl and butyl) are almost the same values, which indicates that the steric effect on the rate is absent. The rate constants, <I>k</I><SUB>1</SUB>'s, correlate well with energy levels of the lowest unoccupied molecular orbitals (<I>E</I><SUB>LUMO</SUB>'s) of univalent anions of arsenic, arsenious, and alkylarsonic acids.
- 公益社団法人 日本化学会の論文
著者
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Yamabe Shinichi
Department Of Chemistry Nara University Of Education
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Okumura Akiko
Department Of Chemistry Nara Women's University
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Iida Masayasu
Department Of Chemistry Faculty Of Science Nara Women's University
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Horie Yuko
Department of Chemistry, Faculty of Science, Nara Women's University
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Niwa Nobuko
Department of Chemistry, Faculty of Science, Nara Women's University
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Fushimi Midori
Department of Chemistry, Faculty of Science, Nara Women's University
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Niwa Nobuko
Department of Chemistry, Faculty of Science, Nara Women's University
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Fushimi Midori
Department of Chemistry, Faculty of Science, Nara Women's University
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Okumura Akiko
Department of Chemistry, Faculty of Science, Nara Women's University
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