Narimani Leila, Yamin Bohari M
School of Chemical Sciences and Food Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia.
Acta Crystallogr Sect E Struct Rep Online. 2012 May 1;68(Pt 5):o1475. doi: 10.1107/S1600536812016637. Epub 2012 Apr 21.
The title compound, C(4)H(8)N(5) (+)·C(2)HO(4) (-), was obtained from the reaction of oxalic acid and 2,4-diamino-6-methyl-1,3,5-triazine. The protonated triazine ring is essentially planar with a maximum deviation of 0.035 (1) Å, but the hydrogen oxalate anion is less planar, with a maximum deviation of 0.131 (1) Å for both carbonyl O atoms. In the crystal, the ions are linked by inter-molecular N-H⋯O, N-H⋯N, O-H⋯O and C-H⋯O hydrogen bonds, forming a three-dimensional network. Weak π-π [centroid-centroid distance = 3.763 Å] and C-O⋯π inter-actions [O⋯centroid = 3.5300 (16) Å, C-O⋯centroid = 132.19 (10)°] are also present.
标题化合物C(4)H(8)N(5) (+)·C(2)HO(4) (-) 是由草酸与2,4-二氨基-6-甲基-1,3,5-三嗪反应得到的。质子化的三嗪环基本呈平面状，最大偏差为0.035 (1) Å，但草酸氢根阴离子的平面度较差，两个羰基O原子的最大偏差均为0.131 (1) Å。在晶体中，离子通过分子间的N-H⋯O、N-H⋯N、O-H⋯O和C-H⋯O氢键相连，形成三维网络。还存在弱的π-π [质心-质心距离 = 3.763 Å] 和C-O⋯π相互作用 [O⋯质心 = 3.5300 (16) Å，C-O⋯质心 = 132.19 (10)°]。
