Crystal structure of a salt complex between (S)-2-(2′-methylbenzyl)succinic acid and (R)-1-phenylethylamine
作者:Yu-min Liu、Yong-qi Hu、He Liu
DOI:10.1007/s10870-006-9111-7
日期:2007.3.6
The optically pure 2-(2′-methylbenzyl)succinic acid were obtained by the optical resolution of the racemates with the chiral host 1-phenylethylamine. The structure of the salt complex between (S)-2-(2′-methylbenzyl)succinic acid and (R)-1-phenylethylamine was first elucidated by X-ray analysis: Monoclinic, Space group P21 with a=6.0781(12) Å, b=8.8224(18) Å, c=17.675(4) Å, β=97.64(3)°, V=939.4(3) Å3, Z=2, the absolute structure parameter is 0 (9). The crystal structure indicates that the hydrogen bonds are formed between the acetate anions and the protonated amino group. The intermolecular hydrogen bond links the salt complex into a quasi-two-dimentional netlike structure.
通过手性主体1-苯乙胺对消旋体进行光学拆分,获得了光学纯的2-(2′-甲基苄基)丁二酸。X射线分析首次阐明了(S)-2-(2′-甲基苄基)丁二酸与(R)-1-苯乙胺盐复合物的结构:单斜晶系,空间群为P21,a=6.0781(12) Å,b=8.8224(18) Å,c=17.675(4) Å,β=97.64(3)°,V=939.4(3) ų,Z=2,绝对结构参数为0(9)。晶体结构表明,乙酸阴离子与质子化的氨基之间形成了氢键。分子间氢键将盐复合物连接成近似二维的网状结构。