R_ {\ bf 4}^{\ bf 4}(30) rectangular rings in 2, 5-dioxopiperazine-1, 4-diacetic acid

M Ramos Silva, A Matos Beja, JA Paixao…

文献索引：Silva, Manuela Ramos; Beja, Ana Matos; Paixao, Jose Antonio; Sobral, Abilio J.F.N.; Cabral, Lucia M.L.; Rocha Gonsalves Acta Crystallographica Section C: Crystal Structure Communications, 2003 , vol. 59, # 10 p. o562-o563

全文：HTML全文

被引用次数: 4

摘要

Molecules of the title 2, 5-dioxopiperazinedione derivative, C8H10N2O6, occupy centres of symmetry in the crystal structure. The six-membered ring has an almost planar conformation, with the substituent on nitrogen nearly perpendicular to the ring. The ideal geometry of the isolated molecule, as determined by ab initio HF–LCAO quantum-mechanical calculations, is slightly more puckered than that observed in the solid state. In the crystal structure, a ...