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1-[5-(2-Chloro-phen-yl)-5-hy-droxy-3-methyl-4,5-dihydro-1H-pyrazol-1-yl]-ethanone. 2012

Sheng-Hai Guo, and Ji-Liang Wang, and Dong-Qiang Guo, and Xin-Ying Zhang
School of Chemistry and Environmental Science, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China.

The title compound, C(12)H(13)ClN(2)O(2), crystallizes with two independent but very similar mol-ecules (A and B) in the asymmetric unit. The pyrazole ring in each mol-ecule has an envelope conformation. The dihedral angle between the pyrazole ring mean plane and the benzene ring is 86.07 (14)° in A and 85.99 (14)° in B. In the crystal, the A and B mol-ecules are linked via a pair of O-H⋯O hydrogen bonds, forming dimers. These dimers are further linked via C-H⋯O inter-actions to form -A-B-A-B- chains propagating along the c-axis direction.

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