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
On the similarity between molecular electron densities, electrostatic potentials and bare nuclear potentials
β Scribed by Shridhar R. Gadre; Rajeev D. Bendale
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 509 KB
- Volume
- 130
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
β¦ Synopsis
The similarities among the molecular contours of three scalar fields, viz. electron density (ED), electrostatic potential (ESP) and bare nuclear potential (BNP) have been investigated. The topological resemblance between ESP and ED contour diagrams (as prompted by the Thomas-Fermi model)is more pronounced than that for BNP and ED contour diagrams (as predicted by the local density functional model of Parr, Cadre and Bartolotti) with three-membered ring systems as test cases. An analysis of critical points of these distributions has also been included. Thus it may be conjectured that ED maps may prove useful in predicting reactive sites in molecules.
π SIMILAR VOLUMES
## Abstract The electrostatic potentials of 21 molecules containing different functional groups has been computed at the __ab initio__ RHF/6β31G\* level on a series of solvent accessible surfaces and compared with MNDO, AM1, and PM3βderived pontentials. We analyzed in detail the distribution of ele
A molecular-orbital study. performed using both multiple scattering Xa and ab uuuo SCF models, is reported for tie 'protonauon process of 02, 0; and O2 The main features of both molecular electrostatic potential and electron deformauon density WUIOUT maps are compared and drscussed.
In part I of this series, the PESP parameterized electrostatic . potential method was described and applied to the calculation of electrostaticpotential-derived charges for a wide variety of organic and inorganic systems. Based on PRDDOrM wave functions and parameterized against ab initio MP2r6-31G