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Five new copper(II), nickel(II) and zinc(II) complexes derived from 2-((2-(pyrrolidin-1-yl)ethylimino)methyl)phenol were synthesized and structurally characterized. Single crystal X-ray analysis indicates that the Cu atoms in the tetranuclear complexes 1 and 2 are in a square pyramidal coordination, the Ni atoms in the trinuclear complexes 3 and 4 are in an octahedral coordination and the Zn atom in the mononuclear complex 5 is in a tetrahedral coordination. In vitro bacterial viability revealed that the copper and zinc complexes have effective antimicrobial activity against B. subtilis , S. aureus , E. coli and P. fluorescens , and general activity against the fungal strains C. albicans and A. niger. [Display omitted] Five new copper(II), nickel(II) and zinc(II) complexes, [Cu 4 Cl 2 (μ 1,1 -N 3) 4 (DMF) 2 ] (1), [Cu 4 Br 2 (μ 1,1 -N 3) 4 (DMF) 2 ] (2), [Ni 3 L 2 (CH 3 COO) 4 ]CH 3 OH (3), [Ni 3 L 2 (CH 3 COO) 2 (μ 1,1 -N 3) 2 (CH 3 OH) 2 ] (4) and [Zn(LH)I 2 ]CH 3 OH (5), were designed and successfully synthesized using the Schiff base ligand 2-((2-(pyrrolidin-1-yl)ethylimino)methyl)phenol (HL). All the synthesized complexes were characterized using different physico-chemical and spectroscopic methods, like elemental analysis, infrared spectra and single crystal X-ray diffraction. The X-ray structural analysis showed that the Cu atoms in the tetranuclear complexes 1 and 2 are in a square pyramidal coordination, the Ni atoms in the trinuclear complexes 3 and 4 are in an octahedral coordination and the Zn atom in the mononuclear complex 5 is in a tetrahedral coordination. The Schiff base ligand was coordinated to the metal atoms through the phenolate oxygen, imino nitrogen and/or pyrrolidine nitrogen atoms. The biological study indicated that the copper and zinc complexes have interesting antimicrobial activity against B. subtilis , S. aureus , E. coli and P. fluorescens , with MIC values of 0.6–2.3 μmol/L. [ABSTRACT FROM AUTHOR]

Four new zinc(II) complexes derived from the bis-Schiff base ligand N,N' -bis(4-bromosalicylidene)-1,3-propanediamine have been synthesized and structurally characterized by elemental analysis, infrared spectra, as well as single crystal X-ray diffraction. X-ray analysis indicates that the Zn atoms in the complexes are in octahedral, tetrahedral and square pyramidal coordination. In vitro bacterial viability revealed that the complexes have effective antimicrobial activities against B. subtilis , S. aureus , E. coli and P. fluorescens. [Display omitted] A series of new zinc(II) complexes, [Zn 2 Cl 2 L(MeOH) 2 ] (1), [Zn 4 Cl 2 L 2 (N 3) 2 ] (2), [Zn 4 Br 2 L 2 (N 3) 2 ] (3) and [Zn 4 I 2 L 2 (N(CN) 2) 2 ] (4), where L is the dianionic form of N,N' -bis(4-bromosalicylidene)-1,3-propanediamine, have been synthesized and structurally characterized by elemental analysis, infrared spectra, as well as single crystal X-ray diffraction. X-ray analysis indicates that the Zn atoms in the dinuclear complex 1 are in octahedral and tetrahedral coordination, while in the tetranuclear complexes 2 , 3 and 4 are in square pyramidal and tetrahedral coordination. In vitro bacterial viability revealed that the complexes have effective antimicrobial activities against B. subtilis , S. aureus , E. coli and P. fluorescens , while weak activities against the fungal strains C. albicans and A. niger. [ABSTRACT FROM AUTHOR]