名称:
Synthesis and Physicochemical Properties of Some β‐Ketoaminato Cobalt(II) Chelates and Their Adducts with 2,2′‐Bipyridine and 1,10‐Phenanthroline
摘要:
The cobalt(II) beta-ketoamines complexes {Co[CH3C(O)CHC(CH3)NR](2); R = CH3, CH2(OH)CH2, C4H9} and ketoiminates {Co[CH3C(O)CH(CH3) C(-N(CH2)(n)N-)C(CH3)CHC(O)CH3]} and their adducts with 2,2'-bipyridine (bipy) and 1,10-phenanthroline (phen) have been synthesized and characterized by elemental analyses, magnetic susceptibility, conductivity, infrared, and electronic spectral measurements. The ligands coordinate to the cobalt ion in a bidentate manner using the N2O2 chromophore. The effective magnetic moments (mu(eff)) observed for the complexes are in the range of 4.20-5.30 BM. Electronic spectra results and magnetic susceptibility measurements are consistent with the adoption of a four-coordinate geometry for the cobalt(II) chelates and a six-coordinate octahedral geometry for the 2,2'-bipyridine and 1,10-phenanthroline adducts. The available conductance data in nitromethane indicates that the compounds are non-electrolytes.