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Chiral crystallization of a zinc(II) complex.

Shabana Noor1, Shintaro Suda2, Tomoyuki Haraguchi2

  • 1Department of Applied Sciences & Humanities, Faculty of Engineering & Technology, Jamia Millia Islamia, New Delhi-110025, India.

Acta Crystallographica. Section E, Crystallographic Communications
|May 24, 2021
PubMed
Summary

This study details the crystal structure of a zinc(II) Schiff base complex. Achiral molecules form a chiral crystal through intermolecular interactions and hydrogen bonding with methanol.

Keywords:
Hirshfeld analysischiral crystallizationcrystal structurezinc(II)

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Area of Science:

  • Coordination Chemistry
  • Crystal Engineering
  • Supramolecular Chemistry

Background:

  • Schiff base ligands are versatile in coordination chemistry.
  • Understanding metal-ligand interactions is crucial for designing functional materials.
  • Crystal structure analysis reveals molecular packing and intermolecular forces.

Purpose of the Study:

  • To characterize the crystal structure of a novel zinc(II) Schiff base complex.
  • To investigate the coordination geometry and intermolecular interactions.
  • To analyze the formation of a chiral crystal from achiral molecules.

Main Methods:

  • Single-crystal X-ray diffraction at 298 K.
  • Analysis of coordination geometry and trigonality index (τ).
  • Hirshfeld surface analysis to quantify intermolecular interactions.

Main Results:

  • The compound [Zn(C22H27N3O4)]·CH3OH crystallizes in the Pna21 space group.
  • The zinc(II) ion exhibits a distorted trigonal-bipyramidal N3O2 coordination geometry.
  • Achiral molecules self-assemble into a chiral crystal via O-H⋯O hydrogen bonds and weak supramolecular interactions, with H⋯H contacts being dominant.

Conclusions:

  • The study provides a detailed structural description of the zinc(II) Schiff base complex.
  • The formation of a chiral crystal from achiral units highlights the role of intermolecular forces in crystal engineering.
  • Hirshfeld surface analysis offers insights into the dominant interactions governing crystal packing.