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我们用BASIC语言在pc-1500袖珍电子计算机上编制和移植了一些半经验量子化学程序,主要有HMO、EHMO、PPP、CNDO和INDO程序。本文介绍PPP(包括闭壳层和开壳层UHF两个程序)和EHMO程序,它是在文献[1]的基础上改编的。一、PPP程序 1.基本公式 PPP方法是由Pariser,Parr和Pople等人建立的一种π电子理论,它的基础是Hartree-Fock-Rathaan方程。对于闭壳层,其方程为:
We compiled and ported some semi-empirical quantum chemical programs in the PC-1500 Pocket PC using the BASIC language, mainly HMO, EHMO, PPP, CNDO and INDO programs. This article introduces the PPP (including closed-shell and open-shell UHF two programs) and EHMO program, which is based on the literature [1] based on the adaptation. First, the PPP program 1. Basic formula PPP method is a π electron theory established by Pariser, Parr and Pople et al, which is based on the Hartree-Fock-Rathaan equation. For the closed shell, the equation is: