An nnnlytic formulation is given for the total potential in atomic and molecular systems, based on the eIectrostatic approach from the Hetlmann-Feynman theorem. The potential function is obtained from the anaIytic solution of the Poisson equation using charge densities expressed as a superposition o
Calculation of molecular electrostatic potentials within the indo framework
β Scribed by J.C. Culberson; Michael C. Zerner
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 411 KB
- Volume
- 122
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
β¦ Synopsis
Original auempls 10 calculate elecrrosIatic pmenlials (EPs) from semi-empirical wavcfumxions okn railed IO march either ;:b initio calculations or rcsulrs inferred from experiment. We rs-cxnmine this problem for benzene and cylosine. LWO or rhe molecules which led 10 the demise or EP studies using waverunctions derived rrom model Hamiltonians. The EPs calculated using the INDO/S method. when cnlcukned correclly. are in good agrsemenl wirh those obmined from good-basis-xl ab inilio campulalions. However both may disagree with results oblnined lrom minimum basis se1 swdies or rewl~z "deduced" rrom cnpcrimenls.
π SIMILAR VOLUMES
The performance of different density functional methods in the calculation of molecular electrostatic potentials and Fukui funcliions, i.e. two reactivity indices based on the electron density, is investigated. It turns out, as a whole, that the exact exchange functionals B3LYP and B3PW91 yield resu
A systematic study of the suitability of PM3-derived molecular electrostatic potentials (MEPs) is presented. Forty-six MEP minima, 81 electrostatic charges, and 17 electrostatic dipoles were determined at the PM3 level and compared with those obtained from the ab initio 6-31G\* wave function, as wel
The effect of the inclusion of electron correlation at the MP2 level on the MESP topography is investigated. The change is analyzed in terms of the MESP value as well as eigenvalues at the critical point (CP). The pi-bond and lone-pair minima become more shallow and flat, and all the CPs indicating