Basak T, Frontera A, Chattopadhyay S. Synthesis and characterization of a mononuclear zinc(ii) Schiff base complex: on the importance of C-H⋯π interactions.
RSC Adv 2021;
11:30148-30155. [PMID:
35480293 PMCID:
PMC9040895 DOI:
10.1039/d1ra03943a]
[Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 08/24/2021] [Indexed: 11/24/2022] Open
Abstract
A zinc(ii) complex, [ZnL(H2O)]·H2O {H2L = 2,2′-[(2,2-dimethyl-1,3-propanediyl)bis(nitrilomethylidyne)]bis[6-ethoxyphenol]} has been synthesized and characterized by UV-vis and IR spectroscopy. The structure of the complex has been confirmed by X-ray crystallography and the noncovalent interactions characterized using Hirshfeld surface analysis. In addition to the conventional H-bonds involving the Zn-coordinated and non-coordinated water molecules, interesting C–H⋯π interactions between the H-atoms belonging to aliphatic part of the ligand (2,2-dimethyl-1,3-propanediyl) and the Zn-coordinated aromatic rings are established. These interactions have been studied using DFT calculations (PBE0-D3/def2-TZVP) and characterized using molecular electrostatic potential (MEP) surfaces and the noncovalent interaction (NCI) plot index analyses.
The strength of the C–H⋯π interaction in the solid state of [ZnL(H2O)]·H2O has been evaluated using DFT calculations and also analysed using the MEP surface and NCI plot index computational tool.![]()
Collapse