Johnson, Atim and Mbonu, Justina and Hussain, Zahid and Loh, Wan Sin and Fun, Hoong Kun
(2015)
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, 71.
pp. 139-140.
ISSN 2056-9890
Abstract
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 A ° 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.
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