Loos Stefan, Seichter Wilhelm, Weber Edwin, Mertens Florian
Acta Crystallogr Sect E Struct Rep Online. 2012 Aug 1;68(Pt 8):o2501. doi: 10.1107/S1600536812031431. Epub 2012 Jul 21.
The asymmetric unit of the title structure, C(8)H(7)NO(4)·2C(3)H(7)NO, contains one 2-amino-terephthalic acid and two N,N-dimethyl-formamide mol-ecules. Strong O-H⋯O hydrogen bonds between the acidic carb-oxy H atoms of 2-am-ino-terephthalic acid and the O atoms of both solvent mol-ecules form linear 1:2 complex units. One H atom of the amine group is involved in intra-molecular N-H⋯O hydrogen bonding, whereas the second one takes part in an inter-molecular N-H⋯O connection. Furthermore, the crystal is stabilized by weak C-H⋯O hydrogen bonds.
标题结构C(8)H(7)NO(4)·2C(3)H(7)NO的不对称单元包含一个2-氨基对苯二甲酸和两个N,N-二甲基甲酰胺分子。2-氨基对苯二甲酸的酸性羧基H原子与两个溶剂分子的O原子之间形成的强O-H⋯O氢键形成线性1:2复合单元。胺基的一个H原子参与分子内N-H⋯O氢键,而另一个H原子参与分子间N-H⋯O连接。此外,晶体通过弱C-H⋯O氢键得以稳定。