Inorganic–organic hybrid metal complexes: 24-membered hexaazamacrocyclic dinuclear nickel complexes hybridized with CdBr42−
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The 24-membered macrocyclic mononuclear cadmium complex reacts with Ni(ClO4)2 in solution and unexpected dinuclear nickel complex was obtained with [CdBr4]2- as counter ions. In the homodinuclear nickel complex, two different coordination environmental entities were observed. One of these is a five-coordinated dinuclear species, the other is a six-coordinated dinuclear species [Ni(1A)2C26H40N6 O2(H2O)2]. In [Ni(1A)2C26H40N6 O2(H2O)2], nickel ion is coordinated to three nitrogen atoms, one phenolic oxygen from the macrocyclic ligand, and with one exogenous water molecule to complete an octahedron. In [Ni(1B)2C26H40N6O2], each nickel ion is five-coordinated without solvent interaction. [CdBr4]2- anions are located in the lattice and serve as hybrid bridges to connect two different molecules and form two layer arrays along the c axis. The whole molecule is described as an ion pair with a two-dimensional hydrogen bonding network. The average bond lengths of Ni-N and Ni-O(phenolic oxygen) are 2.083, 2.028 Å. © 2002 Elsevier Science B.V. All rights reserved.
author list (cited authors)
Kong, D., Ouyang, X., Reibenspies, J., Clearfield, A., & Martell, A. E.