Synthesis, characterization, and structure of a new cobalt(II) Schiff-base complex with quinoxaline- 2-carboxalidine-2-amino-5-methylphenol
                                
                                    
                                        作者:Manju Sebastian、Vasudevan Arun、Ponminiessary P. Robinson、Pally Leeju、Digna Varghese、Gopalakrishnan Varsha、Karukapadath K. Mohammed Yusuff                                    
                                    
                                        DOI:10.1080/00958970903342117
                                    
                                    
                                        日期:2010.1.20
                                    
                                    The mononuclear cobalt(II) complex [CoL2]center dot 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 center dot center dot center dot N and O-H center dot center dot center dot O intermolecular hydrogen bonds and pi-pi stacking interactions, as a racemic mixture of optical enantiomers. The ligand is a Schiff base derived from quinoxaline-2-carboxaldehyde.