Synthesis,characterization, and structure of a new cobalt(II) Schiff-base complex with quinoxaline- 2-carboxalidine-2-amino-5-methylphenol |
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Abstract: | The mononuclear cobalt(II) complex CoL2] · H2O (where HL is quinoxaline-2-carboxalidine-2-amino-5-methylphenol) has been prepared and characterized by elemental analysis, conductivity measurement, IR, UV-Vis spectroscopy, TG?DTA, and X-ray structure determination. The crystallographic study shows that cobalt(II) is distorted octahedral with each tridentate NNO Schiff base in a cis arrangement. The crystal exhibits a 2-D polymeric structure parallel to 010] plane, formed by O?H ··· N and O?H ··· O intermolecular hydrogen bonds and π?π stacking interactions, as a racemic mixture of optical enantiomers. The ligand is a Schiff base derived from quinoxaline-2-carboxaldehyde. |
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Keywords: | Quinoxaline-2-carboxaldehyde 2-Amino-5?methylphenol Crystal structure Schiff base Cobalt(II) |
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