In present paper we have stud- ied a series of Y~- + CH_3Cl and Y~- + CH_3CH_2Cl reactions by means of MNDO method. Preliminary theorctical study has also been made for the S_n2 reaction of larger cyclic molecules.

• 本文用MNDO法对Y~-+CH_3Cl及Y~-+CH_3CH_2Cl反应进行了研究,并对较大环分子的S_N2反应做了初步理论研究。