Abstract
The title compound, [Zn3(C14H11Br2N2O)4](ClO4)2·2CH3CN, crystallizes as a symmetrical trinuclear cation with all three metal atoms being located on a twofold rotation axis. It contains a tetra-hedral ZnII atom that bridges two six-coordinate ZnII atoms. The complex contains N- and O-donor atoms of four tridentate 2,4-di-bromo-6-{[2-(pyridin-2-yl)eth-yl]imino-meth-yl}phenolate ligands. The ratio of ZnII atoms to ligands is 3:4. The two terminal ZnII cations adopt distorted octa-hedral geometries and the central ZnII cation adopts a distorted tetra-hedral geometry. In the cation there are π-π inter-actions between the di-bromo-phenyl rings, as well as halogen-bonding inter-actions between the di-bromo-phenyl rings in the cation, which stabilize its conformation. In addition, there are C-H⋯O inter-actions between the anions and both the cations and solvent mol-ecules as well as C-H⋯N inter-actions between the cation and solvent mol-ecules. These inter-species inter-actions link the cations, anions and solvent mol-ecules into a complex three-dimensional array.
Highlights
The title compound, [Zn3(C14H11Br2N2O)4](ClO4)2Á2CH3CN, crystallizes as a symmetrical trinuclear cation with all three metal atoms being located on a twofold rotation axis
It is of interest to study zinc(II) complexes derived from tridentate Schiff base ligands because of the possibility of forming stable complex structures
In a continuation of our model studies of zinc complexes as Lewis acid center in zinc-containing hydrolytic enzymes (Gultneh et al, 1996; Gultneh et al, 1999; Okeke et al, 2017a,b) we report the structure of the title compound
Summary
Zinc(II)-derived metalloenzymes are among the most common found in biology. Some enzymes containing zinc(II) include carbonic anhydrase, carboxypeptidase, and phosphatase (Bertini et al, 1994; McCall et al, 2000). It is of interest to study zinc(II) complexes derived from tridentate Schiff base ligands because of the possibility of forming stable complex structures. In a continuation of our model studies of zinc complexes as Lewis acid center in zinc-containing hydrolytic enzymes (Gultneh et al, 1996; Gultneh et al, 1999; Okeke et al, 2017a,b) we report the structure of the title compound. This trinuclear zinc(II) complex has a 3:4 metal ion-to-ligand ratio. The central zinc atom is four coordinate and may serve as a suitable complex for various reactions because the ZnII Lewis acid metal center contains vacant coordination sites for coordination to a nucleophile
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