Wu JS, Shlian DG, Palmer JH, Upmacis RK. Crystal structure of hexa-μ-chlorido-μ
4-oxido-tetra-kis-{[1-(2-hy-droxy-eth-yl)-2-methyl-5-nitro-1
H-imidazole-κ
N 3]copper(II)} containing short NO
2⋯NO
2 contacts.
Acta Crystallogr E Crystallogr Commun 2019;
75:1057-1060. [PMID:
31392024 PMCID:
PMC6659319 DOI:
10.1107/s2056989019008570]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 06/16/2019] [Indexed: 11/11/2022]
Abstract
The title tetra-nuclear copper complex, [Cu4Cl6O(C6H9N3O3)4] or [Cu4Cl6O-(MET)4] [MET is 1-(2-hy-droxy-eth-yl)-2-methyl-5-nitro-1H-imidazole or metronidazole], contains a tetra-hedral arrangement of copper(II) ions. Each copper atom is also linked to the other three copper atoms in the tetra-hedron via bridging chloride ions. A fifth coordination position on each metal atom is occupied by a nitro-gen atom of the monodentate MET ligand. The result is a distorted CuCl3NO trigonal-bipyramidal coordination polyhedron with the axial positions occupied by oxygen and nitro-gen atoms. The extended structure displays O-H⋯O hydrogen bonding, as well as unusual short O⋯N inter-actions [2.775 (4) Å] between the nitro groups of adjacent clusters that are oriented perpendicular to each other. The scattering contribution of disordered water and methanol solvent mol-ecules was removed using the SQUEEZE procedure [Spek (2015 ▸). Acta Cryst. C71, 9-16] in PLATON [Spek (2009 ▸). Acta Cryst. D65, 148-155].
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