Selective Synthesis and Structural Conversion of Di- and Octa-nuclear Mn(II), Co(II), and Zn(II) Complexes

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Author(s)

    • Togo Tatsuo
    • Department of Chemistry, Graduate School of Science, Kyushu University
    • Tsuji Yasuhiro
    • Department of Chemistry, Graduate School of Science, Kyushu University
    • Mishima Akio
    • Department of Chemistry, Graduate School of Science, Kyushu University
    • Ohba Masaaki
    • Department of Chemistry, Graduate School of Science, Kyushu University

Abstract

<p>The linear multidentate-type ligand 2,6-di(acetoacetyl)pyridine (H<sub>2</sub>L) selectively gave di- and octa-nuclear complexes, [M<sub>2</sub>(HL)<sub>2</sub>(NO<sub>3</sub>)<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>] (<b>M<sub>2</sub>(HL)<sub>2</sub></b>) and [M<sub>8</sub>(L)<sub>6</sub>(μ<sub>3</sub>-O)<sub>2</sub>] (<b>M<sub>8</sub>L<sub>6</sub></b>), with metal ions (M<sup>II</sup> = Mn, Co, Zn) by adjusting pH. <b>M<sub>2</sub>(HL)<sub>2</sub></b> formed an enolate-bridged dinuclear structure, in which metal ions were in hepta-coordinated pentagonal-bipyramid geometry. The structure of <b>M<sub>8</sub>L<sub>6</sub></b> consisted of two tetranuclear components including mononuclear [MnL<sub>3</sub>]<sup>4−</sup> and trinuclear [Mn(μ<sub>3</sub>-O)]<sup>4+</sup> units, and the tetrads were interdigitated by enolate-bridges. In methanolic solution, <b>M<sub>2</sub>(HL)<sub>2</sub></b> was irreversibly transformed to <b>M<sub>8</sub>L<sub>6</sub></b> with liberation extra L<sup>2−</sup> by the addition of base.</p>

Journal

  • Chemistry Letters

    Chemistry Letters 47(5), 647-649, 2018

    The Chemical Society of Japan

Codes

  • NII Article ID (NAID)
    130006732191
  • Text Lang
    ENG
  • ISSN
    0366-7022
  • Data Source
    J-STAGE 
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