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Formation of Binuclear Cationic Complexes of Nickel(II) with 8-Quinolinol

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Abstract

In order to clarify the reason why the normal 1:2 complex and/or its self-adducts are not extracted, but the ion-pair of the dimer complex is, when a weakly acidic nickel(II) solution containing an anion X” such as perchlorate is shaken with an 8-quinolinol (Hql) solution of organic solvents, Ni-Hql-X (X: ClO4, I and SCN) complexes were formed in ethanol solutions. Their composition, thermal analyses and IR spectra are discussed in connection with their molecular structures. Each Ni-Hql-X complex consists of a binuclear complex cation, [H3(Niql3)2]+ and X−. The binuclear cationic complex, [H3(Niql3)2]+, in which two Niql3− are joined by three very strong hydrogen bonds, is so stable in solution and solid state that its ion-pair complex, [H3(Niql3)2]+X−, can be extracted into organic solvents and precipitated in aqueous solutions.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Kobe University, Rokkodai, Nada, Kobe, 657, Japan

    Eiichi Sekido, Sadami Fukuyori & Hideko Kiriyama

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  1. Eiichi Sekido
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  2. Sadami Fukuyori
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  3. Hideko Kiriyama
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Sekido, E., Fukuyori, S. & Kiriyama, H. Formation of Binuclear Cationic Complexes of Nickel(II) with 8-Quinolinol. ANAL. SCI. 3, 29–33 (1987). https://doi.org/10.2116/analsci.3.29

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  • DOI: https://doi.org/10.2116/analsci.3.29

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