Syntheses, crystal structures and Hirshfeld surface analysis of a coordination polymer of Cu(II) chlorido and a tris-octahedral complex of Ni(II) containing isonicotinoylhydrazone blockers

• Published in: Journal of molecular structure 2018-05, Vol.1160, p.368-374
• Main Authors: Mahmoudi, Ghodrat, Chowdhury, Habibar, Ghosh, Barindra K., Lofland, Samuel E., Maniukiewicz, Waldemar
• Format: Article
• Language: English
• Subjects: Coordination polymers; Crystal structures; Cu(II)/Ni(II) complexes; Hirshfeld surface analysis; Isonicotinoylhydrazone blockers; Magnetism
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2018.02.015

One-pot reactions of pre-assigned molar ratios of appropriate metal (II) salts and HL1 (2-acetylpyridine nicotinoylhydrazone) or HL2 (2-acetylpyridine isonicotinoylhydrazone) in MeOH solutions at room temperature afford 1D coordination polymeric chain [Cu(μ-L1) (Cl)]n (1) and a mononuclear complex [Ni(L2)2] (2). The compounds (1) and (2) were characterized using elemental analyses, spectral and other physicochemical methods. Single crystal X-ray diffraction measurements for (1) and (2) have been made to define the molecular aggregates and crystalline architectures. In (1), each copper (II) center adopts a distorted square pyramidal geometry with a CuN3OCl chromophore linked through μ-L1 to form the 1D polymeric chain. While in (2) each Ni(II) cation is six-coordinate with octahedral structure having NiN4O2 chromophore containing two L2 units each functioning as a classical tridentate (N,N,O) chelator. Different weak non-covalent interactions promote dimensionalities in the compounds. A Hirshfeld surface analysis was employed to gain additional insight into interactions responsible for packing of (1) and (2). Magnetic susceptibility measurement of (1) in the 4–300 K range reveals simple paramagnetism. [Display omitted] •Synthesis of Ni(II) and Cu(II) complexes with isonicotinoylhydrazone blockers.•Structure determination by single-crystal X-ray diffraction.•Additional characterization by elemental analysis, FT-IR, UV–VIS and EPR spectroscopy.•The Hirshfeld analysis is used to investigate the intermolecular interaction.•Magnetic properties of Cu(II) complex.