The stabilities of Meisenheimer complexes. Part 14. Equilibrium and kinetic data for sodium ethoxide addition to 2,4-dinitro-6-X-phenetoles in ethanol
作者:Michael R. Crampton
DOI:10.1039/p29770001442
日期:——
Equilibrium and kineticdata are reported for sodium ethoxide addition in ethanol to a series of 2,4-dinitro-6-X-phenetoles (X = NO2, CO2Et, Cl, or H) to give 1,1-σ complexes. In the case of 2,4,6-trinitrophenetole data for 1,3-complex formation are also provided. The results are compared with those for methoxide additions and are assessed in terms of the electronic and steric behaviour of the substituents
报告了乙醇钠向一系列2,4-二硝基-6-X-苯酚(X = NO 2,CO 2 Et,Cl或H)中添加乙醇钠得到1,1-σ络合物的平衡和动力学数据。。在2,4,6-三硝基苯乙炔的情况下,还提供了1,3-络合物形成的数据。将结果与添加甲醇盐的结果进行比较,并根据取代基的电子和空间行为对其进行评估。1,1-二乙氧基配合物(而不是1,3-复合物)与钠离子强烈缔合。建议该缔合涉及阳离子与C(1)处的烷氧基的氧原子和邻位取代基的相互作用。