Article

Iron(III) Schiff base complexes with asymmetric tetradentate ligands: synthesis, spectroscopy, and antimicrobial properties

Transition Metal Chemistry (impact factor: 1.02). 04/2012; 34(8):899-904. DOI:10.1007/s11243-009-9279-8 pp.899-904

ABSTRACT The synthesis and characterization is reported of four iron(III) complexes of general formula [Fe(pythsalX)(H2O)2]Cl2, derived from the NSNO-donor tetradentate Schiff base ligands pythsalHX ([5-X-N-(2-pyridylethylsulfanylethyl)salicylideneimine]
(X=OMe, N2Ph, I, NO2). The complexes were characterized by physico-chemical and spectroscopic methods. The thermal stabilities of both the free
Schiff bases and their complexes were studied by differential scanning calorimetry and thermogravimetric analyses. The spectroscopic
data suggest that the Schiff base ligands coordinate through deprotonated phenolic oxygen, imine, and pyridine-type nitrogens
and the thioether sulfur atoms to give an octahedral geometry around the iron(III) atom in all these complexes. The free Schiff
bases and their complexes have been screened for antimicrobial activities and the results show that the free Schiff bases
are more potent antibacterials than the complexes.

0 0
 · 
0 Bookmarks
 · 
100 Views
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.

Keywords

antimicrobial activities
 
deprotonated phenolic oxygen
 
differential scanning calorimetry
 
free Schiff bases
 
general formula [Fe(pythsalX)(H2O)2]Cl2
 
iron(III)
 
NSNO-donor tetradentate Schiff base ligands pythsalHX
 
physico-chemical
 
potent antibacterials
 
pyridine-type nitrogens
 
Schiff base ligands
 
spectroscopic methods
 
thermal stabilities
 
thioether sulfur atoms