Fun Hoong-Kun, Chantrapromma Suchada
Acta Crystallogr Sect E Struct Rep Online. 2009 Feb 28;65(Pt 3):o624. doi: 10.1107/S1600536809006448.
Hexane-dioic acid (or adipic acid), C(6)H(10)O(4), crystallizes with two crystallographically independent half-mol-ecules in the asymmetric unit of the triclinic unit cell, space group P, as each mol-ecule lies across a crystallographic inversion centre. A monoclinic polymorph has been reported previously, most recently by Ranganathan, Kulkarni & Rao [J. Phys. Chem. A, (2003), 107, 6073-6081]. The mol-ecules adopt the expected zigzag structure and are linked via centrosymmetric pairs of O-H⋯O hydrogen bonds, forming infinite one-dimensional chains along [011]. These chains are stacked along the a axis. The crystal is further stabilized by weak C-H⋯O inter-actions.
己二酸（C₆H₁₀O₄）在三斜晶胞的不对称单元中以两个晶体学独立的半分子形式结晶，空间群为P，因为每个分子都位于一个晶体学反演中心上。之前已经报道过一种单斜晶型，最近的报道来自Ranganathan、Kulkarni和Rao [《物理化学杂志A》，(2003)，107，6073 - 6081]。分子呈现出预期的锯齿形结构，并通过中心对称的O - H⋯O氢键对相连，沿着[011]方向形成无限的一维链。这些链沿着a轴堆积。晶体通过弱的C - H⋯O相互作用进一步稳定。
