Kinetics and mechanism of the reaction between 2,3,4,5,6-pentafluorophenylacetonitrile and guanidine-like bases and the structure of the products
作者:Błażej Gierczyk、Grzegorz Schroeder、Piotr Przybylski、Bogumil Brzezinski
DOI:10.1016/j.molstruc.2006.02.015
日期:2006.8
Abstract The reactions between the 2,3,4,5,6-pentafluorophenylacetonitrile (PFPA) and such strong N-bases as 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (MTBD) and 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) have been studied by UV–vis kinetic, high-resolution LSIMS, 19 F NMR and FT-IR methods. The products of these reactions (compounds 1 and 2 and oligomers) have been isolated and their structures have been
摘要 2,3,4,5,6-五氟苯基乙腈(PFPA)与强N-碱如7-甲基-1,5,7-三氮杂双环[4.4.0]dec-5-烯(MTBD)的反应和 1,5,7-三氮杂双环[4.4.0]dec-5-烯 (TBD) 已通过紫外-可见动力学、高分辨率 LSIMS、19 F NMR 和 FT-IR 方法进行了研究。这些反应的产物(化合物 1 和 2 以及低聚物)已被分离出来,并已使用上述方法研究了它们的结构。它们已被鉴定为邻位或对位取代的二聚体以及 PFPA 的三聚体、四聚体和五聚体的混合物。所有产品都是在由各种低平衡常数描述的相对缓慢的过程中形成的。邻位或对位取代二聚体的结构已通过 PM5 半经验计算可视化。