Synthetic aspects, crystal structures and antibacterial activities of manganese(III) and cobalt(III) complexes containing a tetradentate Schiff base
- Author(s)
- Michel Fleck, Manas Layek, Rajat Saha, Debasis Bandyopadhyay
- Abstract
Three new Schiff base complexes, namely [Mn(L)Cl] · H2O (1), [Co(L)Cl]2 · 2CH3COCH3 (2) and [Co(L)NCS]2 (3), where H2L = 2,2'-[propane-1,2-diylbis(nitriloeth-1-yl-1-ylidene)]diphenol, have been prepd. and characterized. The syntheses of 1 and 2 have been achieved by reacting equimolar amts. of the resp. metal chloride and the tetradentate Schiff base ligand (H2L). While the mononuclear Mn(III) complex 1 was obtained with MnCl2 in acetone medium, the same synthetic system yielded the binuclear Co(III) complex 2 in the presence of CoCl2. Dissoln. of 1 and 2 followed by crystn. with ammonium thiocyanate in methanol yielded two isostructural phenoxo-bridged binuclear complexes, namely [Mn(L)NCS]2 (previously reported by us) and a new complex [Co(L)NCS]2 (3), resp. All the complexes 1-3 have been characterized by microanal., spectroscopic, single crystal X-ray diffraction and other physicochem. studies. Structural studies reveal that 1 adopts a distorted tetragonal pyramidal geometry while 2 and 3 comprise dimeric Co(III) units with bridging phenolate oxygen atoms. All the complex units in 1-3 and the resp. solvent mols. are held together by weak intermol. H-bonding to constitute a supramol. network in the solid state. The antibacterial activity of the complexes has been tested against some Gram(+) and Gram(-) bacteria.
- Organisation(s)
- Department of Mineralogy and Crystallography
- External organisation(s)
- Bankura Christian College, Jadavpur University
- Journal
- Transition Metal Chemistry: an international journal
- Volume
- 38
- Pages
- 715-724
- No. of pages
- 10
- ISSN
- 0340-4285
- DOI
- https://doi.org/10.1007/s11243-013-9741-5
- Publication date
- 10-2013
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105113 Crystallography, 104015 Organic chemistry
- Keywords
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/7f0f2eda-8e22-43d5-ab87-d7ec93329fb2