Synthesis and structural characterization of a novel seven-coordinate cobalt(II) complex: 2,9-Bis(ethanolamine)-1,10-phenanthrolinechlorocobalt(II) chloride |
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Authors: | Ak?n Baysal Murat Aydemir Saim Özkar |
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Institution: | a Dicle University, Department of Chemistry, 21280 Diyarbak?r, Turkey b Middle East Technical University, Department of Chemistry, 06531 Ankara, Turkey c Hacettepe University, Department of Engineering Physics, Beytepe, 06800 Ankara, Turkey |
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Abstract: | Condensation reaction of 2,9-dicarboxaldehyde-1,10-phenanthroline with 2-aminoethanol followed by NaBH4 reduction yielded the polydentate Schiff base ligand 2,9-bis(ethanolamine)-1,10-phenanthroline in its reduced form. This ligand was characterized by elemental analysis, LC-MS, IR, UV-Vis and NMR spectroscopy. Reaction of the reduced Schiff base ligand with aqueous solution of cobalt(II) chloride affords 2,9-bis(ethanolamine)-1,10-phenanthrolinechlorocobalt(II) chloride in high yield. Single crystals of the cobalt(II) complex were obtained from the crystallization in ethanol and its structure was elucidated by X-ray structural analysis. The cobalt(II) complex ion was found to be seven-coordinated in a pentagonal bipyramidal geometry, whereby cobalt(II) ion is surrounded by the six donor atoms in the ligand molecule and a chloride ion. |
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Keywords: | 1 10-Phenanthroline Schiff base Cobalt Seven-coordinate X-ray |
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