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(4-Bromo-3,5-dimethyl-1H-pyrazol-1-yl)(2,6-difluoro-phen-yl)methanone. 2009

Xiang-Dong Mei, and Yan-Hui Liang, and Zhong-Yue Wang
Key Laboratory of Pesticide Chemistry and Applications, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China.

There are two mol-ecules in the asymmetric unit of the title compound, C(12)H(9)BrF(2)N(2)O. They have very similar conformations: the dihedral angles between their pyrazole and benzene ring systems are 78.4 (3) and 78.6 (4)°. In the crystal, weak aromatic π-π stacking [centroid-centroid separation = 3.696 (5) Å] helps to establish the packing.

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