Synthesis, crystal and molecular structure of 2-methyl-3-carboethoxyquinoxaline 1,4-dioxide
作者:Shu-Kun Lin、Qiu-Zhi Cong
DOI:10.1016/0022-2860(87)80046-7
日期:1987.7
Abstract 2-Methyl-3-carboethoxyquinoxaline 1,4-dioxide (MCQO) was prepared and single crystals were grown out of the reaction mixture. The structure of MCQO was established by single-crystal X-ray crystallography using a direct method. The crystals are triclinic, space group P 1 , with a = 6.928(1), b = 8.109(1), c = 10.552(1) A, α = 83.445(8), β = 85.861(10), γ = 79.168 (8)°, V = 577.7 A3, Z = 2 and
摘要 制备了 2-Methyl-3-carboethoxyquinoxaline 1,4-dioxide (MCQO) 并从反应混合物中生长出单晶。MCQO 的结构是通过单晶 X 射线晶体学使用直接方法建立的。晶体为三斜晶系,空间群 P 1 ,a = 6.928(1), b = 8.109(1), c = 10.552(1) A, α = 83.445(8), β = 85.861(10), γ = 79.168 (8)°,V = 577.7 A3,Z = 2 和 Dc = 1.428 g cm−3。对于 1454 次反射,结构被细化为 R = 0.059。母体喹喔啉环的平面几何形状与化合物中稠合杂环系统的芳香性一致。平均NO键长为1.297(5)A,具有一定的双键特性。X 射线分析证实了此类杂芳族 N-氧化物结构的 IR、NMR 和 ESR 光谱证据。