Chiral crystallization of a zinc(II) complex.

Acta Crystallogr E Crystallogr Commun

Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.

Published: May 2021

The compound, {6,6'-dimeth-oxy-2,2'-[(4-azaheptane-1,7-di-yl)bis-(nitrilo-meth-an-yl-idyne)]diphenolato}zinc(II) methanol monosolvate, [Zn(CHNO)]·CHOH, at 298 K crystallizes in the ortho-rhom-bic space group P2. The Zn atom is coordinated by a penta-dentate Schiff base ligand in a distorted trigonal-bipyramidal NO geometry. The equatorial plane is formed by the two phenolic O and one amine N atom. The axial positions are occupied by two amine N atoms. The distorted bipyramidal geometry is also supported by the trigonality index (τ), which is found to be 0.85 for the mol-ecule. In the crystal, methanol solvent mol-ecule is connected to the complex mol-ecule by an O-H⋯O hydrogen bond and the complex mol-ecules are connected by weak supra-molecular inter-actions, so achiral mol-ecules generate a chiral crystal. The Hirshfeld surface analysis suggests that H⋯H contacts account for the largest percentage of all inter-actions.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8100267PMC
http://dx.doi.org/10.1107/S2056989021003650DOI Listing

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