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3436786 
Journal Article 
Copper(II) complexes of three isomeric bis(tacn) ligands: Syntheses, structures and properties 
Coghlan, CJ; Campi, E; Batten, , SR; Jackson, W; Hearn, MTW 
2016 
1 
Polyhedron
ISSN: 02775387 
Elsevier Ltd 
105 
246-252 
English 
WOS:000370900600030 
Two new isomeric bis(tacn) ligands, 3,5-bis(1,4,7-triazacyclonon-l-ylmethyl)-1-(hydroxymethyl)-benzene (HLhyx) and 2,6-bis(1,4,7-triazacyclonon-l-ylmethyl)anisole (L-anx) 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)center dot 3H(2)O at pH 5 resulting in the formation of three binuclear complexes. The ligands L-anx 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 [Cu-2(mu-Cl)(L-ohx)(PF6)(2), with the two Cu centres further linked by (mu-Cl) and (mu-O) bridges. (C) 2015 Elsevier Ltd. All rights reserved. 
Copper(II) complexes; Aza-macrocycles; Crystal structures; m-Xylene linkers; Immobilised metal ion affinity; chromatography 
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