Kuai Hai-Wei
Faculty of Life Science and Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2012 Nov 1;68(Pt 11):o3068. doi: 10.1107/S1600536812041025. Epub 2012 Oct 6.
Crystals of the title compound, C(16)H(12)N(2)O(4), were obtained accidentally by the hydro-thermal reaction of 5-[(1H-benzo[d]imidazol-1-yl)meth-yl]isophthalic acid with manganese chloride tetra-hydrate in the presence of KOH as alkaline reagent for the deprotonation. A triclinic polymorph of this structure has been reported previously from a similar reaction [Cheng (2011 ▶). Acta Cryst. E67, o3299]. The benzimidazole ring system is almost planar, with a maximum deviation from the mean plane of 0.020 (4) Å. The benzimidazole unit and benzene ring are inclined at a dihedral angle of 68.17 (4)°, reflecting the axial rotation of the flexible benzimidazolyl arm. In the crystal, pairs of O-H⋯O hydrogen bonds link adjacent mol-ecules into inversion dimers. O-H⋯N contacts connect these dimers into zigzag chains along [010].
标题化合物C(16)H(12)N(2)O(4)的晶体是在氢氧化钾作为去质子化碱性试剂存在的情况下，通过5-[(1H-苯并[d]咪唑-1-基)甲基]间苯二甲酸与四水合氯化锰的水热反应意外获得的。该结构的一种三斜多晶型物先前已从类似反应中报道过[程（2011 ▶）。《晶体学报》E67，o3299]。苯并咪唑环系统几乎是平面的，与平均平面的最大偏差为0.020 (4) Å。苯并咪唑单元与苯环的二面角为68.17 (4)°，反映了柔性苯并咪唑基臂的轴向旋转。在晶体中，O-H⋯O氢键对将相邻分子连接成反演二聚体。O-H⋯N接触将这些二聚体沿[010]连接成锯齿链。
