Abstract

The title CuII complex, [Cu(C13H11N2OS2)2], features a trans-N2S2 donor set as a result of the CuII atom being located on a crystallographic centre of inversion and being coordinated by thiol-ate-S and imine-N atoms derived from two di-thio-carbazate anions. The resulting geometry is distorted square-planar. In the crystal, π(chelate ring)-π(fur-yl) [inter-centroid separation = 3.6950 (14) Å and angle of inclination = 5.33 (13)°] and phenyl-C-H⋯π(phen-yl) inter-actions sustain supra-molecular layers lying parallel to (02). The most prominent inter-actions between layers, as confirmed by an analysis of the calculated Hirshfeld surface, are phenyl-H⋯H(phen-yl) contacts. Indications for Cu⋯Cg(fur-yl) contacts (Cu⋯Cg = 3.74 Å) were also found. Inter-action energy calculations suggest the contacts between mol-ecules are largely dispersive in nature.

Highlights

  • Chemical contextDithiocarbazates, derived from sulfur–nitrogen donor ligands were first reviewed in the 1970s (Ali & Livingstone, 1974)

  • Schiff base derived from S-benzyldithiocarbazate and 2-hydroxy-5-(phenyldiazenyl)benzaldehyde against a human cervical cancer line (HeLa) (Kongot et al, 2019)

  • The molecular structure of (I), Fig. 1, has the CuII atom located on a crystallographic centre of inversion and coordinated by two chelating dithiocarbazate anions, each via the thiolate-S and imine-N atoms (Table 1)

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Summary

Chemical context

Dithiocarbazates, derived from sulfur–nitrogen donor ligands were first reviewed in the 1970s (Ali & Livingstone, 1974) These Schiff base molecules are readily prepared from the reaction of primary amines with aldehydes or ketones and are potentially multidentate ligands for metals (Ali et al, 2005; Mokhtaruddin et al, 2017). A copper(II) dithiocarbazate complex containing a Schiff base derived from S-hexyldithiocarbazate and 4-methylbenzaldehyde was reported to have excellent anti-bacterial activity against Escherichia coli (Zangrando et al, 2017). As part of on-going studies in the structural chemistry and potential bioactivity of copper(II) complexes containing dithiocarbazate Schiff base ligands, the synthesis of the title copper(II) complex, (I), its single crystal X-ray diffraction analysis and a detailed study of supramolecular association by an analysis of calculated Hirshfeld surfaces and computation chemistry are described.

Structural commentary
Supramolecular features
Analysis of the Hirshfeld surfaces
Computational chemistry
Database survey
Synthesis and crystallization
Refinement
Funding information
Full Text
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