The solvent extraction of alkali metal picrates by benzo-15-crown-5.

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概要

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• Benzo-15-crown-5 (B15C5) extracted alkali metal picrates (MA) into benzene by forming M(B15C5)A or M(B15C5)<SUB>2</SUB>A complexes and moreover, in the presence of tributyl phosphate (B), B15C5 extracted rubidium and caesium picrates by forming M(B15C5)BA complexes. The extractability sequences of the M(B15C5)A, M(B15C5)<SUB>2</SUB>A, and M(B15C5)BA complexes are Na<SUP>+</SUP>>K<SUP>+</SUP>>Rb<SUP>+</SUP>>Li<SUP>+</SUP>>Cs<SUP>+</SUP>,K<SUP>+</SUP>>Rb<SUP>+</SUP>>Cs<SUP>+</SUP>>, and Rb<SUP>+</SUP>>Cs<SUP>+</SUP> respectively. The extraction equilibrium constants for these complexes have been determined at 25 °C, and the synergistic formation constants of the M(B15C5)<SUB>2</SUB>A and M(B15C5)BA complexes in the benzene solution have been calculated. The synergistic effects for the alkali metal ions for the B15C5 system were compared with those for the 15C5 system.

• 公益社団法人 日本化学会の論文

著者

• Takeda Yasuyuki

  Department Of Chemistry Faculty Of Science Chiba University

• Fujiwara Shizuo

  Department Of Chemistry Faculty Of Science Chiba University

• Wada Yoshimasa

  Department of Chemistry, Faculty of Science, Chiba University

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