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Synthesis and X-Ray Crystal Structures of Trinuclear Nickel(II) Complexes Derived from Schiff Bases and Acetate Ligands with Biological Activity

Jin-Long Hou, Hong-Yuan Wu, Cheng-Bin Sun, Ye Bi, Wei Chen

Abstract


The reactions of Ni(OAc)2·2H2O with Schiff base ligands 5-bromo-2-((cyclopentylimino)methyl)phenol (HL1) and 5-bromo-2-(((2-(isopropylamino)ethyl)imino)methyl)phenol (HL2)  in methanol afforded two discrete trinuclear complexes [Ni3(L1)2211-OAc)2(DMF)2(BrSal)2] (1) and [Ni3(L2)2211-OAc)2221-OAc)2] (2), where BrSal is the monoanionic form of 4-bromosalicylaldehyde. The complexes were characterized by elemental analysis, IR and UV-Vis spectroscopy. The crystal structures of the complexes have been determined by X-ray crystallography. In both complexes, the nickel atoms are in octahedral coordination geometries. The L1 ligand coordinates to the nickel atoms through the phenolate O and imino N atoms, and the L2 ligand coordinates to the nickel atoms through the phenolate O, imino N and amino N atoms. The antimicrobial activities of the complexes were assayed.


Keywords


Nickel complexes; Schiff bases; Crystal structures; Trinuclear complexes; Antimicrobial activity

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DOI: http://dx.doi.org/10.17344/acsi.2020.5824

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Copyright (c) 2020 Jin-Long Hou, Hong-Yuan Wu, Cheng-Bin Sun, Ye Bi, Wei Chen

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