Synthesis and characterization of dinuclear copper(II) complexes, [Cu2([20]-DCHDC)(La)2] (La = N3−, NCS− or S2O32−) with tetraazadiphenol macrocyclic ligand having cyclohexane rings

The chiral dinuclear tetraazadiphenol macrocyclic copper(II) complexes [Cu2([20]-DCHDC)(La)2] {H2[20]-DCHDC = 14,29-dimethyl-3,10,18,25-tetraazapentacyclo-[25,3,1,04,9,112,16,019,24]ditriacontane-2,10,12,14,16(32),17,27(31),28,30-decane-31,32-diol; La = N3− (II), NCS− (IV) or S2O32− (V)} has been synthesized and structurally characterized by elemental analysis, conductance, electronic and IR spectra as well as FAB-MS method. Crystal structure of [Cu2([20]-DCHDC)(N3)2]·2CH3OH (III) determined by X-ray crystallography reveal the two square pyramidal copper centers bridged by the two phenoxide oxygen atoms, with large Cu–O–Cu angles {100.88(10)°}.