Kinetics and mechanism of aminolysis of propargyl and 1-methyl-propargyl arenesulphonates
作者:Hyuck Keun Oh、In Ho Cho、Min Jeong Jin、Ikchoon Lee
DOI:10.1002/poc.610071107
日期:1994.11
Kinetic studies were carried out on the aminolysis of propargly and 1-methylpropargyl arenesulphonates in acetonitrile at 45·0°C. The cross-interaction constants, ρxz and βxz, are similar to, but smaller than, those for the SN2 processes at other primary and secondary carbon centers. Compared with the allyl series, the smaller magnitude of ρxz and βxz reflects a looser transition state, which in turn
在45·0℃下,对炔丙基和1-甲基炔丙基芳磺酸酯在乙腈中的氨解进行了动力学研究。交叉相互作用常数ρxz和βxz与其他初级和次级碳中心的S N 2过程相似,但比其小。与烯丙基系列相比,较小的ρxz和βxz反映出较松散的过渡态,尽管塔夫脱(Taft)的σ*值较大且固有(ΔE)和热力学势垒(ΔE 0)。