Bivalent metal complexes of N,N-bis(2-hydroxyethyl)glycine.

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概要

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• Complexes of <I>N</I>,<I>N</I>-bis(2-hydroxyethyl)glycine(BHEG) with a bivalent cation (Cu(II), Ni(II), Co(II), Zn(II), Fe(II), Cd(II), and Pb(II)) have been prepared and investigated by means of infrared absorption spectra, powder surface diffuse reflection spectra, electronic spectra, magnetic susceptibility, and thermal analysis. They can be classified into two types: (A) ML<SUB>2</SUB>·<I>n</I>H<SUB>2</SUB>O and (B) ML·X·<I>n</I>H<SUB>2</SUB>O, (M: metal, L: BHEG<SUP>−</SUP>, X: Cl<SUP>−</SUP> or NO<SUB>3</SUB><SUP>−</SUP>). Ni(II), Co(II), Zn(II), and Fe(II) complexes are of type A, and those of Cd(II) and Pb(II) of type B. In the case of Cu(II) complexes, a blue A type complex (Cu(II)-A) has been prepared from a basic solution and a green B type one (Cu(II)-B) from an acidic solution. From detailed assignments of IR spectra, BHEG is found to have a zwitter ion structure. From magnetic moment data and reflection spectra, we presume that the A type complexes have a <I>trans</I> octahedral structure and the B type complexes a tetrahedral structure.

• 公益社団法人 日本化学会の論文

著者

• Moriwaki Takao

  Department of Chemistry, Faculty of Science and Technology, Sophia University

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