| Abstract |
Nine new cobalt(II) compounds, trans-[Co(L-PAQ)(2)(Py)(2)] (1), trans[Co(L-PAQ)(2)(3-MePy)(2)] (2), trans-[Co(L-MeAQ)(2)(Py)(2)] (3), trans[ Co(LOMeAQ)(2)(Py)(2)] (4), trans-[Co(LOEtAQ) 2(Py)(2)]center dot 2(H2O) (5), trans[ Co(LCAQ)(2)(Py) 2] (6), trans-[Co(LBAQ)(2)(Py)(2)] (7), cis-[Co(LBAQ)(2)(3MePy) 2] (8a) and trans-[Co(LBAQ)(2)(3-MePy)(2)]center dot 2(3-MePy) (8b) (primary ligand: LXAQ = substituted 5-[(E)-2-(aryl)-1-diazenyl] quinolin-8olate; secondary ligands: Py = pyridine, 3-MePy = 3-methylpyridine), have been synthesized and characterized by elemental analysis, IR and UV-vis spectroscopy. Magnetic measurements of the cobalt compounds were performed in solution by H-1 NMR spectroscopy using the Evans method while their redox properties were studied by cyclic voltammetry. Single-crystal X-ray diffraction analysis of the compounds revealed their octahedral geometries and trans configuration, except for 8a, which has a cis configuration. Intermolecular noncovalent interactions were detected, pi center dot center dot center dot pi interactions in 5, C-H center dot center dot center dot pi interactions in 2 and C-H center dot center dot center dot pi edge-to-face (T-shaped) arrangements in 3, 4, 6, and 7. [GRAPHICS] . |
