Crystal structure of tetraaquabis(3,5-diamino-4H-1,2,4-triazol-1-ium)cobalt(II) bis[bis(pyridine-2,6-dicarboxylato)cobaltate(II)] dihydrate

Acta Crystallographica Section E: Crystallographic Communications

Justina Mbonu¹  Atim Johnson²  Zahid Hussain²  Hoong-Kun Fun³  Wan-Sin Loh³ 

[1] Department of Chemistry, Federal University of Petroleum Recourses Effurun, Delta State, Nigeria;H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75720, Pakistan;X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia;

关键词: crystal structure;    pyridine-2,6-dicarboxylate;    triazolium;    CoII complex;    hydrogen bonding;   

DOI  :  10.1107/S2056989015010014

来源: DOAJ

【 摘 要 】

The asymmetric unit of the title compound, [Co(C2H6N5)2(H2O)4][Co(C7H3NO4)2]2·2H2O, features 1.5 CoII ions (one anionic complex and one half cationic complex) and one water molecule. In the cationic complex, the CoII atom is located on an inversion centre and is coordinated by two triazolium cations and four water molecules, adopting an octahedral geometry where the N atoms of the two triazolium cations occupy the axial positions and the O atoms of the four water molecules the equatorial positions. The two triazole ligands are parallel offset (with a distance of 1.38 Å between their planes). In the anionic complex, the CoII ion is six-coordinated by two N and four O atoms of the two pyridine-2,6-dicarboxylate anions, exhibiting a slightly distorted octahedral coordination geometry in which the mean plane of the two pyridine-2,6-dicarboxylate anions are almost perpendicular to each other, making a dihedral angle of 85.87 (2)°. In the crystal, molecules are linked into a three-dimensional network via C—H...O, C—H...N, O—H...O and N—H...O hydrogen bonds.

【 授权许可】

Unknown