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      https://www.ias.ac.in/article/fulltext/jcsc/127/01/0115-0122

    • Keywords

       

      Isophthalato-bridged; macrocyclic nickel(II) complexes; crystal structure; circular dichroism spectra.

    • Abstract

       

      Three dinuclear isophthalato-bridged nickel(II) complexes formulated as [Ni(rac-L)]2(𝜇-IPA)(ClO4)2 (1), [Ni($RR$-L)]2(𝜇-IPA)(ClO4)2 (2) and [Ni(SS-L)]2(𝜇-IPA)(ClO4)2 (3) (L = 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyc-lotetradecane, IPA = isophthalic acid) have been isolated and characterized. Single crystal X-ray diffraction analyses revealed that the Ni(II) atoms have six-coordinated distorted octahedral environments, and the isophthalato ligand bridges two Ni(II) centres in a bis bidentate fashion to form dimers in all three complexes. The monomers of {[Ni($SS$-L)]2(𝜇-IPA)}2+ are connected through intermolecular hydrogen bonds to generate one-dimensional left-handed helical chains in complex 3. The homochiral natures of complexes 2 and 3 have been confirmed by CD spectroscopy.

    • Author Affiliations

       

      Guang-Chuan Ou1 2 Zhi-Zhang Li1 Lin Yuan1 2 Xian-You Yuan1

      1. Department of Biology and Chemistry, Hunan University of Science and Engineering, 425 199 Yongzhou, Hunan, P. R. China
      2. Key Laboratory of Functional Organometallic Materials of Hunan Province College, Hengyang Normal University, 4210 08 Hengyang, Hunan, P. R. China

    • Dates

       
      Published
      January 2015
      Manuscript received
      4 March 2014
      Manuscript revised
      7 June 2014
      Accepted
      19 June 2014

    • Supplementary Material

       

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