Copper(II) complexes of three isomeric bis(tacn) ligands: Syntheses, structures and properties

Campbell J. Coghlan, Eva M. Campi, Stuart R. Batten, W. Roy Jackson, Milton T.W. Hearn

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4 Citations (Scopus)


Two new isomeric bis(tacn) ligands, 3,5-bis(1,4,7-triazacyclonon-1-ylmethyl)-1-(hydroxymethyl)-benzene (HLhyx) and 2,6-bis(1,4,7-triazacyclonon-1-ylmethyl)anisole (Lanx) have been synthesised. In addition, 2,6-bis(1,4,7-triazacyclonon-1-ylmethyl)-4-methylphenol (HLohx) was also synthesised in a considerably higher yield than the previously reported method. The ligands were reacted with two equivalents of Cu(NO3)2·3H2O at pH 5 resulting in the formation of three binuclear complexes. The ligands Lanx and HLhyx form complexes [Cu2Cl3(L)(H2O)](PF6) containing two unique Cu2+ centres coordinated to the ligand. In contrast, the phenolic HLohx ligand forms a bridged complex [Cu2(μ-Cl)(Lohx)](PF6)2, with the two Cu centres further linked by (μ-Cl) and (μ-O) bridges.

Original languageEnglish
Pages (from-to)246-252
Number of pages7
Publication statusPublished - 17 Feb 2016


  • Aza-macrocycles
  • Copper(II) complexes
  • Crystal structures
  • Immobilised metal ion affinity chromatography
  • m-Xylene linkers

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