The cocrystal formed by diethyl N,N´-[1,3-(2-methyl)phenyl]dioxalamate (1) and resorcinol (2), namely 1·2 cryst (C21H24N2O8) was prepared by mechanochemical complexation. IR spectroscopy and powder X-ray diffraction studies allowed to determine the complexation and the conformational switching of the ethyl oxalamate side arms. In the crystal structure of 1·2 cryst , complexation occurs through O–H···O=C hydrogen-bonding interactions with the participation of phenolic O–H as donor and amide carbonyl group as acceptor. The steric hindrance of the CH3 group in the C-2 position of the aromatic ring leads to a meso–helical supramolecular architecture forming a C 2 2 (16) chain motif. Crystal data: monoclinic, C2/c space group, a = 34.9054(13) Å, b = 8.0434(5) Å, c = 5.1577(8) Å, β = 97.521(3)°. The cocrystal formed by diethyl N,N´-[1,3-(2-methyl)phenyl]dioxalamate and resorcinol, prepared by mechanochemical complexation.
通过机械
化学络合法制备了由 N,N´-[1,3-(2-甲基)苯基]二恶英
氨基甲酸乙酯(1)和
间苯二酚(2)形成的共晶体,即 1-2 cryst (
C21H24N2O8)。通过红外光谱和粉末 X 射线衍射研究,可以确定
草氨酸乙酯侧臂的络合和构象转换。在 1-2 号晶体结构中,络合是通过 O-H-O=C 氢键相互作用发生的,
酚 O-H 作为供体,酰胺羰基作为受体。位于芳香环 C-2 位置的
CH3 基团的立体阻碍导致中螺旋超分子结构形成 C 2 2 (16) 链图案。晶体数据:单斜,C2/c 空间群,a = 34.9054(13) Å,b = 8.0434(5) Å,c = 5.1577(8) Å,β = 97.521(3)°。由 N,N´-[1,3-(2-甲基)苯基]
二恶烷甲酸二
乙酯和
间苯二酚通过机械
化学络合制备的共晶体。