Shahani Tara, Fun Hoong-Kun, Ragavan R Venkat, Vijayakumar V, Sarveswari S
Acta Crystallogr Sect E Struct Rep Online. 2010 Jul 7;66(Pt 8):o1937-8. doi: 10.1107/S1600536810025948.
The title compound, C(13)H(13)F(3)N(2)O(2), crystallizes with two independent mol-ecules in the asymmetric unit, with different conformations of their ethyl side chains. The dihedral angles formed between the 1H-pyrazole and benzene rings in the two mol-ecules are 79.44 (6) and 77.81 (6)°. In the crystal, mol-ecules are linked by O⋯H-N hydrogen bonds into chains propagating along [001] and the packing is further stabilized by π-π inter-actions [centroid-centroid separations = 3.5409 (10) and 3.6335 (10) Å].
标题化合物C₁₃H₁₃F₃N₂O₂在不对称单元中以两个独立分子结晶,其乙基侧链具有不同的构象。两个分子中1H-吡唑环与苯环之间形成的二面角分别为79.44(6)°和77.81(6)°。在晶体中,分子通过O⋯H-N氢键连接成沿[001]方向延伸的链,并且堆积通过π-π相互作用[质心-质心间距 = 3.5409(10)和3.6335(10)Å]进一步稳定。