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http://nopr.niscpr.res.in/handle/123456789/33767| Title: | Synthesis, crystal structure, redox property and theoretical studies of a pyrrole containing cobalt(III) Schiff base compound |
| Authors: | Panja, Anangamohan Mandal, Tarun Kanti |
| Keywords: | Coordination chemistry;Schiff bases;Pyrrole ligands;Cobalt;X-ray crystal structures;Density functional calculations;Cyclic voltammetry;Mass spectroscopy |
| Issue Date: | 15-Feb-2016 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | A new mononuclear cobalt(III) complex with a pentadentate Schiff base ligand derived from the condensation of N-(3-aminopropyl)-propane-1,3-diamine with pyrrole-2-aldehyde has been synthesized and structurally characterized by X-ray crystallography. Structural analysis shows that the geometry of cobalt(III) ion is a distorted octahedron in which triamine part of the pentadentate ligand occupies the meridional positions, while two pyrrole nitrogen atoms are in cis disposition. Despite the potentially interesting similarities of pyrrole-based ligands to porphyrin systems, the present complex is inactive towards the oxidation of o-aminophenol, while analogous systems with pyridine containing ligands have proven to be efficient functional models for phenoxazinone synthase. Although the electrospray ionization mass spectral study clearly indicates the formation of a complex-substrate aggregate, the inability towards oxidation of o-aminophenol by the present complex can be explained electrochemically, where strong electron donating ability of the deprotonated pyrrole moiety reduces the possibility of reduction of cobalt(III) to cobalt(II). |
| Page(s): | 137-144 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.55A(02) [February 2016] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 55A(2) 137-144_Suppl Data.pdf | Supplementary Data | 171.24 kB | Adobe PDF | View/Open |
| IJCA 55A(2) 137-144.pdf | Main Article | 286.86 kB | Adobe PDF | View/Open |
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