Synthesis, crystal structure and Hirshfeld surface analysis of [Cu(H₂ L)₂(μ-Cl)CuCl₃]·H₂O [H₂ L =...

The present study focuses on the synthesis and structural characterization of a novel dinuclear Cu^II complex, [tri-chlorido-copper(II)]-μ-chlorido-{bis-[2-hy-droxy-N'-(propan-2-yl-idene)benzohydrazide]copper(II)} monohydrate, [Cu₂Cl₄(C₁₀H₁₂N₂O₂)₂]·H₂O or [Cu(H₂ L)₂(μ-Cl)CuCl₃]·H₂O [H₂ L = 2-hy-droxy-N'-(propan-2-yl-idene)benzohydrazide]. The complex crystallizes in the monoclinic space group P2₁/n with one mol-ecule of water, which forms inter-actions with the ligands. The first copper ion is penta-coordinated to two benzohydrazine-derived ligands via two nitro-gen and two oxygen atoms, and one bridging chloride, which is also coordinated by the second copper ion alongside three terminal chlorines in a distorted tetra-hedral geometry. The arrangement around the first copper ion exhibits a distorted geometry inter-mediate between trigonal bipyramidal and square pyramidal. In the crystal, chains are formed via inter-molecular inter-actions along the a-axis direction, with subsequent layers constructed through hydrogen-bonding inter-actions parallel to the ac plane, and through slipped π-π stacking inter-actions parallel to the ab plane, resulting in a three-dimensional network. The inter-molecular inter-actions in the crystal structure were qu-anti-fied and analysed using Hirshfeld surface analysis. Residual electron density from disordered methanol mol-ecules in the void space could not be reasonably modelled, thus a solvent mask was applied.