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

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Abstract

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)°}.

Graphical abstract

The dinuclear tetraazadiphenol macrocyclic copper(II) complexes [Cu2([20]-DCHDC)(La)2] (La = N3, NCS or S2O32) are prepared by reacting [Cu2([20]-DCHDC)Cl2]∙H2O with an aqueous solution of NaN3, NaSCN, or Na2S2O3. The stable monoclinic crystals, [Cu2([20]-DCHDC)(N3)2]∙2CH3OH (III) suitable for X-ray crystallography are grown from complex II solution on slow evaporation of solvent methanol.

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Acknowledgments

Following are results of a study on the “Human Resource Development Center for Economic Region Leading Industry” Project, supported by the Ministry of Education, Science and Technology (MEST) and the National Research Foundation of Korea (NRF).

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