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5-Ethyl-4-phenyl-1H-pyrazol-3(2H)-one

机译:5-乙基-4-苯基-1H-吡唑-3(2H)-一

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摘要

The asymmetric unit of the title compound, C11H12N2O, consists of two crystallographically independent mol-ecules (A and B) with similar geometries. Both mol-ecules exist in a keto form, the C=O bond length being 1.286?(2)?? in A and 1.283?(2)?? in B. The dihedral angles between the pyrazole ring and the attached phenyl ring are 43.28?(12) and 46.88?(11)°, respectively, for A and B. The ethyl unit in mol-ecule B is disordered over two positions with a site-occupancy ratio of 0.508?(5):0.492?(5). In the crystal, each of the independent mol-ecules forms a centrosymmetric dimer with an R22(8) ring motif through a pair of N—H?O hydrogen bonds. These dimers are further connected into a three-dimensional network by inter-molecular N—H?O and C—H?O hydrogen bonds. Inter-molecular C—H?π inter-actions are also present.
机译:标题化合物C11H12N2O的不对称单元由两个晶体学独立的分子(A和B)组成,它们具有相似的几何形状。两种分子均以酮形式存在,C = O键的长度为1.286?(2)?。在A和1.283中?(2)? A和B的吡唑环与连接的苯环之间的二面角分别为43.28°(12)和46.88°(11)°。分子B中的乙基单元在两个位置上无序排列站点占用率为0.508?(5):0.492?(5)。在晶体中,每个独立的分子通过一对N-H2O氢键形成具有R22(8)环基序的中心对称二聚体。这些二聚体还通过分子间NH-OH和CHH-O氢键连接成三维网络。还存在分子间CH-π相互作用。

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