Magnetic Properties of Copper(II) Complexes of 6-Aminopurine and 6-Hydroxypurine

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概要

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• The magnetic susceptibilities of bis(6-aminopurinato)copper(II) trihydrate, dichlorobis(6-aminopurine)copper (II) sesquihydrate, and dichlorobis(6-hydroxypurine)copper(II) monohydrate obey the Bleaney-Bowers equation for binuclear clusters in conformity with the results of X-ray crystal analysis. The exchange integrals within binuclear clusters were evaluated as <I>J</I>⁄<I>k</I>=−156 to −208°K. Superexchange interaction rather than the interaction of direct nature operates predominantly between copper atoms through the pπ orbitals of the heterocycles. The <I>J</I>⁄<I>k</I> values of the compounds are nearly equal to the value, −204°K, of copper(II) acetate monohydrate, although the Cu–Cu distance in the former is greater than that in the latter. The magnetic susceptibilities of dibromobis(6-aminopurine)copper(II) dihydrate, dibromobis(6-hydroxypurine)copper(II) dihydrate, dichloro(6-aminopurme)copper (II), dichloro(6-hy droxypurine)copper (II) monohydrate, and dibromo(6-hydroxypurine)copper(II) hemihydrate indicate the presence of paired copper atoms in the crystals.

• 公益社団法人 日本化学会の論文

著者

• Kubo Masaji

  Department of Chemistry Nagoya University

• Asakawa Toshiro

  Department of Chemistry, Nagoya University

• Inoue Motomichi

  Department of Chemistry, Nagoya University

• Hara Ken-ichi

  Department of Chemistry, Nagoya University

• Hara Ken-ichi

  Department of Chemistry, Faculty of Science, Nagoya University

• Inoue Motomichi

  Department of Chemistry and Department of Physics, Faculty of Science, Nagoya University

• Kubo Masaji

  Department of Chemistry, Nagoya University

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