Acta Cryst. (2007). E63, m1915-m1916  [ doi:10.1107/S1600536807028462 ]

Di-₂-aqua-bis[aqua(2,2'-diamino-4,4'-bi-1,3-thiazole-²N,N')(4-nitrobenzoato-O)cadmium(II)] bis(4-nitrobenzoate)

G.-H. Chen, Y.-Y. Lin, Y.-P. Yu and B.-X. Liu

Abstract: The title compound, [Cd₂(C₇H₄NO₄)₂(C₆H₁₀N₄O₂S₂)₂](C₇H₄NO₄)₂, consists of dimeric Cd^II complex cations and uncoordinated 4-nitrobenzoate anions. Within the complex cation, each Cd^II cation assumes a distorted octahedral coordination geometry, formed by a diaminobithiazole (DABT) ligand, a 4-nitrobenzoate anion and two coordinated water molecules. Two coordinated water molecules bridge two Cd^II cations to form the dimeric complex cation across an inversion centre. The two thiazole rings of the chelating DABT ligand are twisted with respect to each other, forming a dihedral angle of 3.91 (18)°. The centroid-to-centroid separation of 3.7601 (19) Å indicates the existence of - stacking between nearly parallel thiazole rings in the crystal structure. O-HO and N-HO hydrogen bonding between complex cations and uncoordinated 4-nitrobenzoate anions, and between complex cations, helps to stabilize the crystal structure.

Online 15 June 2007

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