Site specificity of metal ions in heterodinuclear complexes derived from an "end-off" compartmental ligand

Koji Abe, Kanako Matsufuji, Masaaki Ohba, Hisashi Okawa

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

A phenol-based "end-off" compartmental ligand, 2-{N-[2-(dimethylamino)ethyl]iminomethyl}-6-[N,N-di(2-pyridylmethyl) -aminomethyl]-4-methylphenol (HL), having a bidentate arm and a tridentate arm attached to the 2 and 6 positions of the phenolic ring, has afforded the following heterodinuclear MaIIMbII complexes: [CuM(L)(AcO)2]CIO4 (M = Mn (1), Fe (2), Co (3), Ni (4), Zn (5)), [ZnM(L)(AcO)2]CIO4 (M = Co (6), Ni (7)), and [CuNi(L)(AcO)(NCS)2] (8). 1·MeOH (1′), 2·MeOH (2′), 3·MeOH (3′), 4·MeOH (4′), 5·MeOH (5′), and 7·MeOH (7′) are isostructural and have a heterodinuclear core bridged by the phenolic oxygen atom of L- and two acetate groups. In 1′-5′ the CuII is bound to the bidentate arm and has a square-pyramidal geometry with one acetate oxygen at the apical site. The MII is bound to the tridentate arm and has a six-coordinate geometry together with two acetate oxygen atoms. In the case of 7′ the Zn is bound to the bidentate arm and the Ni is bound to the tridentate arm. 8·2-PrOH (8′) has a dinuclear core bridged by the phenolic oxygen atom of L- and one acetate group. The Cu bound to the bidentate arm has a square-pyramidal geometry with an isothiocyanate group at the apical site. The Ni bound to the tridentate arm has a six-coordinate geometry with further coordination of an isothiocyanate group. The site specificity of the metal ions is discussed together with the crystal structure of [Cu4(L)2(AcO)3] (CIO4)3·H2O (9) prepared in this work.

Original languageEnglish
Pages (from-to)4461-4467
Number of pages7
JournalInorganic chemistry
Volume41
Issue number17
DOIs
Publication statusPublished - Aug 26 2002

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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