Quaternarization is an important SN2 nucleophilic substitution reaction; solvent has remarkable effect on it.
季铵化反应是一类重要的SN2亲核取代反应，溶剂对该反应的影响很显著。
2
The CO2-reactivity of char samples fromcoal macerals is related to specific surface area (SN2) measured with N2 adsorption method.
煤岩显微组分富集物焦的CO_2反应性与N_2吸附测得的比表面有关。
3
After it was mixed with epoxy resin, transition state was formed first. Then they got on with opening ring reactions according to bimolecular nucleophilic substitution mechanism (SN2).