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Paper Information

Journal:   JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS)   APRIL 2014 , Volume 11 , Number 2; Page(s) 431 To 440.
 
Paper: 

SYNTHESIS, CHARACTERIZATION AND CRYSTAL STRUCTURE OF SOME NEW MN (II) AND ZN (II) MACROACYCLIC SCHIFF BASE COMPLEXES DERIVED FROM TWO NEW ASYMMETRICAL (N5) BRANCHED AMINES AND PYRIDINE-2-CARBALDEHYDE OR O-VANILINE AND THEIR ANTIBACTERIAL PROPERTIES

 
 
Author(s):  REZAEIVALA MAJID*, KEYPOUR HASSAN, SALEHZADEH SADEGH, LATIFI REZA, CHALABIAN FIROOZEH, KATOUZIAN FATEMEH
 
* DEPARTMENT OF CHEMICAL ENGINEERING, HAMEDAN UNIVERSITY OF TECHNOLOGY, 65155, HAMEDAN, IRAN
 
Abstract: 

Two new branched pentadentate amines (N5), 3,6-bis (2-pyridylmethyl)-5 methyl-3,6-diazaheptane diazahexane-1-amine (1) and 4,7-bis (2-pyridylmethyl)-6-methyl-4,7-diazaheptane-1-amine (2) have been prepared. These have been used for the synthesis for the eight new macroacyclic Schiff base complexes, by template [1+1] condensation of pyridine-2-carbaldehyde or O-vaniline and amines (1 and 2) in the presence of Mn (II) and Zn (II) metal ions in methanol. The isolated complexes were characterized by a combination of microanalysis, IR and Mass spectroscopy. The structure of MnL1 (ClO4)2 indicates that in the solid state the Mn (II) ion adopts a slightly distorted octahedral geometry. The synthesized compounds have antibacterial activity against the three Gram-positive bacteria: Enterococcus faecalis, Bacillus cereus and Staphylococcus epidermidis and also against the three Gram-negative bacteria: Citrobacter freundii, Enterobacter aerogenes and Salmonella typhi. The structure of the complexes derived from pyridine-2-carbaldehyde and metal-ligand interactions in these complexes were also theoretically studied. It was indicated that the structure of complexes is similar to each other and metal-ligand interactions depend mainly on the nature of metal ion and is similar for this series of ligands.

 
Keyword(s): MACROACYCLIC SCHIFF BASE COMPLEXES, MANGANESE (II) COMPLEXES, ASYMMETRICAL BRANCHED AMINE, CRYSTAL STRUCTURE, THEORETICAL STUDIES, BIOLOGICAL STUDIES
 
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