Synthesis, crystal structure and antibacterial activity of azido complexes of cobalt(III) containing heteroaromatic Schiff bases

Author(s)
Debasis Bandyopadhyay, Manas Layek, Michel Fleck, Rajat Saha, Corrado Rizzoli
Abstract

Three new Schiff base complexes of cobalt(III) viz. [Co(L

1)(N

3)]

2(1), [Co(L

2)

2(N

3)

2]NO

3(2) and [Co(L

3)

2(N

3)

2]ClO

4(3), where H

2L

1 = N,N′-propane-1,3-diylbis[1-(pyrrol-2-yl)methanimine], L

2 = 1-[(thiophen-2-ylmethylidene)amino]propan-2-amine and L

3 = 1-[(3-methylthiophen-2-ylmethylidene)amino]propan-2-amine, have been prepared and characterized. The syntheses have been achieved by the reaction of cobalt(II) nitrate or perchlorate with the tetradentate Schiff base (H

2L

1) or the bidentate ligands L

2and L

3in presence of azide. All the complexes 1–3 have been characterized by microanalytical, spectroscopic, single crystal X-ray diffraction and other physicochemical studies. Structural studies reveal that all the complexes contain CoN

6chromophore in which the central Co(III) ions adopt distorted octahedral geometry. While 1 is a binuclear end-on bis(μ-azido) complex, both of 2 and 3 are mononuclear with two terminal azide ions disposed in cis positions. Structural studies reveal that weak intermolecular H-bonding or π…π interactions are operative to bind the complex units or the anions in the solid state. The antibacterial activity of all the complexes and their constituent Schiff base ligands has been tested against some Gram(+) and Gram(−) bacteria.

Organisation(s)
Department of Mineralogy and Crystallography
External organisation(s)
Kazi Nazrul University, Bankura Christian College, Università degli studi di Parma
Journal
Inorganica Chimica Acta
Volume
461
Pages
174-182
No. of pages
9
ISSN
0020-1693
DOI
https://doi.org/10.1016/j.ica.2017.02.018
Publication date
02-2017
Peer reviewed
Yes
Austrian Fields of Science 2012
104015 Organic chemistry, 104017 Physical chemistry, 105113 Crystallography
Keywords
ASJC Scopus subject areas
Materials Chemistry, Inorganic Chemistry, Physical and Theoretical Chemistry
Portal url
https://ucrisportal.univie.ac.at/en/publications/9860bff5-5d4f-4399-92fb-45c2509aa6e4