Formation of the N,N-bidentate chelates of 2-(2-pyridylazo)phenolic ligands with nickel(II) in nonaqueous solvents.
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概要
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The formation of <I>N</I>,<I>N</I>-bidentate 1:2 complexes of nickel(II) with various <I>N</I>,<I>N</I>,<I>O</I>-terdentate 2-(2-pyridylazo)phenolic ligands was detected spectrophotometrically in ethyl acetate and was examined with respect to the influences of Brønsted bases, the counter anions in the nickel(II) salts employed, solvent basicity, and the steric requirements around the donor nitrogen atoms in the ligand in the 1:2 complex. It is concluded that the stability of the <I>N</I>,<I>N</I>-bidentate complex species in solutions predominantly depends on the basicity of the counter anions X in NiX<SUB>2</SUB> and of the solvent. In the case of 1-(2-pyridylazo)-2-naphthol, owing to a high steric hindrance of the naphthalene ring, the formation of the <I>N</I>,<I>N</I>-bidentate complex was not observed even in the solvent of low basicity such as dioxane.
- 公益社団法人 日本化学会の論文
著者
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KUDO Yoshihiro
Department of Applied Physics, Faculty of Engineering, The University of Tokyo
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YOSHIDA Noboru
Department of Chemistry, Faculty of Science, Hokkaido University
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FUJIMOTO Masatoshi
Department of Chemistry, Faculty of Science, Hokkaido University
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Kudo Yoshihiro
Department of Chemistry II, Faculty of Science, Hokkaido University
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