Nucleophilicities of Para-Substituted Phenoxide Ions in Water and Correlation Analysis
作者:W. GABSI、T. BOUBAKER、R. GOUMONT
DOI:10.1002/kin.20846
日期:2014.12
benzotriazoles 1a‐d were linear, allowing to derive the nucleophilicity parameters N and s for phenoxide ions as defined by the Mayr equation log k1 (20°C) = s (E + N) (H. Mayr, M. Patz. Angew Chem, Int Ed Engl 1994, 33, 938–957). The N values are found to cover a range of nucleophilicity from 6.85 to 10.22, going from 4‐cyanophenoxide 2d for the least reactive ion to 4‐methoxyphenoxide 2a for the most reactive
2-芳基-4-6,6-二硝基苯并三唑1-氧化物1a-d与一些4-X-取代的酚盐离子2a-d(X = OCH 3,H,Cl和CN)的反应的二级速率常数为在20℃下在水溶液中测量。根据相关性E = –3.20 – 0.662 p K a(F. Terrier,S),在水中测量的一系列苯并三唑1a-d的σ络合过程的p K a值已用于确定其亲电参数E。。拉赫达尔,T. Boubaker和R. Goumont,有机化学杂志,2005,70,6242-6253)。对于这些反应,log k的图苯并三唑1a-d的亲电参数E与线性关系是线性的,因此可以得出Mayr方程log k 1(20°C)= s(E + N)(H.)定义的酚盐离子的亲核参数N和s。迈尔,M. PATZ。Angew化学,诠释埃德英格兰1994,33,938-957)。的Ñ值被发现覆盖范围亲核性从6.85到10.22,从4- cyan