wR(F 2) = 0.089 S = 1.08 1724 reflections 4283 measured reflections 1724 independent reflections 1585 reflections with I>2 (I) R int = 0.052 78 parameters H-atom parameters constrained max = 0.68 e A ˚ 3 min = 0.76 e A ˚ 3 Key indicators: single-crystal X-ray study; T = 298 K; mean (C–C) = 0.004 A˚; R factor = 0.033; wR factor = 0.090; data-to-parameter ratio = 22.1. The asymmetric unit of the title compound, [CdCl2-(C12H12N2)]n, contains one half-molecule; a twofold rotation axis passes through the Cd atom. The Cd II atom is sixcoordinated in a distorted octahedral configuration by two N atoms from 2,20-bipyridine-5,50-dimethyl and four bridging Cl atoms. The bridging function of the chloro atoms leads to a one-dimensional chain structure. There is a – contact between the pyridine rings [centroid–centroid distance
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