Narendra Babu Shivanagere Nagojappa, Abdul Rahim Aisyah Saad, Abd Hamid Shafida, Jebas Samuel Robinson, Fun Hoong-Kun
Acta Crystallogr Sect E Struct Rep Online. 2009 May 7;65(Pt 6):o1233-4. doi: 10.1107/S1600536809015487.
In the title compound, C(11)H(14)N(2)O(4), all non-H atoms lie in a mirror plane except for one of the methyl groups which deviates from the mirror plane by 0.919 (3) Å and is twisted by a torsion angle of 62.9 (2)°. An intra-molecular N-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal packing, the mol-ecules are linked together by O-H⋯O hydrogen bonds, forming dimers with graph-set motif R(2) (2)(8) which propagate along the a-axis direction. C-H⋯O contacts link adjacent dimers with a graph-set motif C(2) (2)(7), forming chains along b, and further consolidate the structure into a three-dimensional network. The crystal packing is further strengthened by short inter-molecular O⋯O=C [2.655 (4) Å] contacts.
在标题化合物C₁₁H₁₄N₂O₄中，除了一个甲基偏离镜面0.919(3) Å且扭转角为62.9(2)°外，所有非氢原子都位于一个镜面内。分子内N—H⋯O氢键形成一个S(6)环 motif。在晶体堆积中，分子通过O—H⋯O氢键连接在一起，形成具有R(2)²(8)图形集 motif的二聚体，这些二聚体沿a轴方向延伸。C—H⋯O接触以C(2)²(7)图形集 motif连接相邻二聚体，沿b方向形成链，并进一步将结构巩固成三维网络。短的分子间O⋯O=C [2.655(4) Å]接触进一步加强了晶体堆积。
