A recent Letter by Johnson, Gill, Pople and Fox discussing the computation of the molecular electrostatic potential over a set of points is similar to our earlier studies. A detailed comparison of the two approaches is presented. An extension of our earlier work for the PC/AT and 12%node MIMD machin
Reply to Comment on “Computing molecular electrostatic potentials with the PRISM algorithm”
✍ Scribed by Benny G. Johnson; John A. Pople; Peter M.W. Gill; Douglas J. Fox
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 135 KB
- Volume
- 218
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
This Reply clarifies the similarities and differences between our work and that of Gadre et al. in computing ab initio molecular electrostatic potentials. The principal advance described by us was to cast the PRISM algorithm for two-electron repulsion integrals in a form suitable for the calculation of molecular electrostatic potentials.
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A procedure for computing molecular electrostatic potentials (MEPs) at low computational cost is tested, Analysis of MEPs derived from SCF wavefunctions computed using STO-3G, 6-3 1G and 6-3 1 G\* basis sets reveals the marked influence of the basis set on the well depth and the location of minima.
A new approach to the computation of molecular electrostatic potentials based on the AM1 wave function is described. In contrast to the prevailing philosophy, but consistent with the underlying NDDO approximation, no deorthogonalization of the wave function is carried out. The integrals required for