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    • Xian-You Yuan

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    • Volume 127 Issue 1 January 2015 pp 115-122 Regular Articles

      Synthesis and crystal structures of three isophthalato-bridged macrocyclic nickel(II) complexes

      Guang-Chuan Ou Zhi-Zhang Li Lin Yuan Xian-You Yuan

      More Details Abstract Fulltext PDF

      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.

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