中文摘要：

2,5-piperazinedione 的新衍生物， 1,4-di (2-methoxyphenyl )-2,5-piperazinedione (I) ，被 N-2-methoxyphenyl chloroacetamide，和它的结构的 cyclocondensation 反应综合被元素的分析，红外， 1H NMR 和单身者描绘水晶 X 光检查衍射方法。水晶属于单斜晶的系统，有统一房间尺寸 a=0.56934 (10 ) nm 的空格组 P21/c， b=1.3880 (2 ) nm， c=1.00329 (17 ) nm， =90.376 (3 )? e

英文摘要：

A new derivative of 2,5-piperazinedione, 1,4-di（2-methoxyphenyl）-2,5-piperazinedione （I）, was synthesized by the cyclocondensation reaction of N-2-methoxyphenyl chloroacetamide, and its structure was characterized by elemental analysis, IR, ^1H NMR and single crystal X-ray diffraction method. The crystal belongs to monoclinic system, space group P21/c with unit cell dimensions a=0.56934（10） nm, b=1.3880（2） nm, c=1.00329（17） nm, β= 90.376（3）°, V= 0.7928（2） nm^3, Z=2, Dc = 1.367 g·cm^-3,μ = 0.98 cm^-1, R and wR being 0.0606 and 0.1564 respectively for 1549 unique reflections with 1247 observed reflections [I〉2σ（I）]. The molecule has a crystallographically imposed symmetry center. The three rings in the molecule are each coplanar with their attached groups, excluding methyl H atoms and the H atoms attached to the piperazinedione ring, while the whole molecule is not planar, with dihedral angles of 74.7（1）° between the piperazinedione and each of the two aromatic rings. The crystal structure is stabilized by van der Waals and dipole-dipole forces.