Syntheses, structures and properties of a new compound of the type [Zn(4,4′-dmo-2,2′-bpy)2(CH3COO)]2[Zn(SCN)4]·H2O with zinc in two cationic and one anionic complexes
Affiliations: [a] Department of Food Industry, Maku Branch, Islamic Azad University, Maku, Iran | [b] Department of Chemistry, Payame Noor University, Tehran, Iran | [c] Institut für Anorganische Chemie, Universitaet Regensburg, Regensburg, Germany
Correspondence:
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Correspondence to: Hossein Shirdel, Department of Food Industry, Maku Branch, Islamic Azad University, Maku, Iran. h.shirdel1300@yahoo.com
Correspondence:
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Correspondence to: Farzin Marandi, Department of Chemistry, Payame Noor University, Tehran, Iran. Tel.: +98 44 33869363; f.marandi@gmail.com
Abstract: A new compound of zinc(II) with the ligand 4,4′-dimethoxy-2,2′-bipyridine(4,4′-dmo-2,2′-bpy), [Zn(4,4′-dmo-2,2′-bpy)2(CH3COO)]2[Zn(SCN)4]·H2O, has been obtained as white single crystals by the branched tube method and characterized by elemental analysis, IR and 1H NMR spectroscopy and by X-ray crystallography. Thermal and electrochemical properties were also studied. The crystal structure consits of two discrete [Zn(4,4′-dmo-2,2′-bpy)2(CH3COO)] + cations and a [Zn(SCN)4]2 − anion. Zinc(II) cations in the [Zn(4,4′-dmo-2,2′-bpy)2(CH3COO)] + units have a distorted octahedral surrounding by ZnN4O2 coordinated through four N atoms of 4,4′-dmo-2,2′-bpy and two O atoms of acetate. Zinc(II) in [Zn(SCN)4]2 − has a distorted tetrahedral coordination environment with an ZnN4 ligated by four N atoms of the terminal thiocyanates. In the solid state, [Zn(4,4′-dmo-2,2′-bpy)(CH3COO)] + cations are interconnected by tetrahedral [Zn(NCS)4]2
− units by cooperative C–H···O, C–H···S, C–H···N and π-π stacking interactions resulting in a 2D network structure. Establishment of such networks seems to be aiding the crystallization.
