Chelate ring stacking interactions in the supramolecular assemblies of Zn(ii)and Cd(ii) coordination compounds: a combined experimental and theoretical study

Abstract

We report seven Zn(ii)/Cd(ii) complexes with picolinoyl/isonicotinoyl hydrazone based ligands exhibiting relevant chelate–π interactions.

Crystal structure and Hirshfeld surface analysis of 4,5-dibromo-6-methyl-2-phenyl-2,3,3a,4,5,6,7,7a-octahydro-3a,6-epoxy-1H-isoindol-1-one

“…It can on the one hand be the halogen-initiated Wagner-Meerwein cationic rearrangement (Jung et al, 1985;Ciganek et al, 1995;Zubkov et al, 2004Zubkov et al, , 2018Zaytsev et al, 2020), or on the other hand we can observe electrophilic addition of halogens to multiple bonds (Berson et al, 1954;Barlow et al, 1971;Kobayashi et al, 1976;Solov'eva et al, 1984). Halogenated organic compounds are of interest because of their photoactivity in the solid state, high solubility in halocarbons, high thermal and oxidative stability, etc., to which non-covalent halogen bonding can contribute (Afkhami et al, 2017;Maharramov et al, 2018;Mahmoudi et al, 2017Mahmoudi et al, , 2019Shixaliyev et al, 2014). In view of its higher directionality, the halogen bond can be better suited than the hydrogen bond for the building of functional materials by non-covalent self-assembly via specific molecular interactions Kopylovich et al, 2011;Ma et al, 2017aMa et al, ,b, 2020Mahmudov et al, 2012Mahmudov et al, , 2013Mahmudov et al, , 2019Mahmudov et al, , 2020.…”

Crystal structure and Hirshfeld surface analysis of diiodido{N′-[(E)-(phenyl)(pyridin-2-yl-κN)methylidene]pyridine-2-carbohydrazide-κ2 N′,O}cadmium(II)

“…Hydrazone ligands show high efficiency in chelating transition-metal ions (Afkhami et al, 2017a); such ligands obtained from pyridine carboxylic acids can act as ditopic ligands because of their two different donor sites, including an Ndonor pyridine group and a tridentate coordination pocket, and have the potential to form mono-, di-and multinuclear structures (Afkhami et al, 2017b). In this work, we report the synthesis, crystal structure and Hirshfeld surface analysis of the title Cd II complex, (I), containing the tridentate hydrazone ligand N 0 -[(E)-(pyridin-2-yl)methylidene]pyridine-2-carbohydrazide.…”

Crystal structures of dibromido{N-[(pyridin-2-yl-κN)methylidene]picolinohydrazide-κ2 N′,O}cadmium methanol monosolvate and diiodido{N-[(pyridin-2-yl-κN)methylidene]picolinohydrazide-κ2 N′,O}cadmium

“…The cadmium(II) ion, has a d 10 electronic configuration and exhibits a variety of coordination geometries and modes. Hydrazone ligands are one of the most important classes of flexible and versatile polydentate ligands and show very high efficiency in chelating transition metal ions (Afkhami et al, 2017a). Hydrazone ligands obtained from 2-pyridine carboxylic acid can act as ditopic ligands via two different donor sites (a tridentate coordination pocket and through an Ndonor pyridine group), and have the potential to form monoand multinuclear structures (Afkhami et al, 2017b).…”