Crystal structure and thermal properties of novel Co(II) complexes with 2,6-pyridine-dicarboxylate containing infinite one-dimensional chain: [CoL ~1(H_2O)_4][Co(pydc)_2]?_2H 2O and [Co(H_2O)_6]×[Co(pydc) _2]L~2?H_2O (L~1 = 1,3-bis(4-pyridyl)propane

摘要

The two title compounds were prepared from the ligand pydc with cobalt(II) acetate in the presence of L~1 and L~2 (L~1 = 1,3-bis(4-pyridyl)propane, L~2 = 3-amino-1H-1,2,4-triazole, pydc = 2,6-pyridinedicarboxylic acid). The complexes were characterized by elemental analysis, IR spectrum and single crystal X-ray diffraction. Single crystal analysis shows that in two complexes coordination number around Co atom is six with distorted octahedral geometry, and both two complexes consist of ion pairs containing cationic [Co(H_2O) _n ]~(2+) and anionic [Co(pydc)_2]~(2-) units.