crystal structure and thermal properties of novel Co(II) complexes with 2,6-pyridinedicarboxylate containing infinite one-dimensional chain: [CoL1(H2O)4][Co(pydc)2]·2H2O and [Co(H2O)6][Co(pydc)2]L2·H2O (L1 = 1,3-bis(4-pyridyl)propane, L2 = 3-amino-1H-1,2,4-triazole, pydc = 2,6-pyridinedicarboxylic acid)
M.-S. Zhang, B.-W. Sun, R.-B. Fang, Q.-H. Zhao
Keywords: Co(II) complexes; one-dimentional complexes; crystal structure; hydrogen bonding; 2, 6-pyridinedicarboxylic acid
Pages: 1180-1186
Abstract
The two title compounds were prepared from the ligand pydc with cobalt(II) acetate in the presence of L1 and L2 (L1 = 1,3-bis(4-pyridyl)propane, L2 = 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(H2O)n]2+ and anionic [Co(pydc)2]2- units.
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