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Crystal and molecular structure of thiophene-2-carboxaldehydeo-chlorobenzoyl-hydrazone

The crystal and molecular structure of the title compound, C 12 H 9 ClN 2 OS, has been determined from three-dimensional X-ray diffraction data. The structure is orthorhombic, Pca2 1 , with a = 12.244(3), b = 10.664(2), c = 9.341 (2) A, and Z = 4. The structure was solved by direct methods and refined by least-squares to a final R = 0.052 for 1247 observed reflections [Fo > Sσ(F o )]. The molecule consists of three parts: the phenyl ring, the thiophene ring and the central chain. Both rings are perfectly planar within the experimental error and their dimensions are as expected