Synthesis, crystal structure and Hirshfeld surface analysis of [Cu(H 2 L ) 2 (μ-Cl)CuCl 3 ]·H 2 O [H 2 L = 2-hy-droxy- N '-(propan-2-yl-idene)benzohydrazide].

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, [Cu 2 Cl 4 (C 10 H 12 N 2 O 2 ) 2 ]·H 2 O or [Cu(H 2 L ) 2 (μ-Cl)CuCl 3 ]·H 2 O [H 2 L = 2-hy-droxy- N '-(propan-2-yl-idene)benzohydrazide]. The complex crystallizes in the monoclinic space group P 2 1 / 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.