๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

A semi-empirical method for estimating molecular quadrupole polarizabilities

โœ Scribed by Eric A. Gislason; Malini S. Rajan


Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
374 KB
Volume
50
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

โœฆ Synopsis


It IC demonstrated that a lo:+1c.g plot of (ticld-gradient) quadrupolc poldrizablhrlcs agm~s~ dqxAc pOi.lrizabllltle:b of "chern~celly smlthr" atoms can be well fit with n str.+t lint. The tiieorctical Justific2! tmn for thlb 1s dlscusscti. 'I Ile hypethesis is advanced that the average qundrupole polari~hility for a molecule can be estimated from the avcrdgc d~polc polnri-Lability using the be% tit to the atomic data This method works well for II 2. the only molecule with ;tn accurately known quadrupole polanzablhty.


๐Ÿ“œ SIMILAR VOLUMES


Rapid geometry optimization for semi-emp
โœ J.W. McIver Jr.; A. Komornicki ๐Ÿ“‚ Article ๐Ÿ“… 1971 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 770 KB

For semi-empirical molecular orbital methods, the gradient of the potential energy can be calculated with negligiiIe additional computational expense. This allows powerful minimization methods to be used to ahdate the geometries of large molecules The particular minimization method used is shown to

An analysis of predictions by the semi-e
โœ N.Colin Baird; Graham C. Hadley ๐Ÿ“‚ Article ๐Ÿ“… 1986 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 688 KB

Calculations using the MNDO HE molecular\*rbital method predict that NHd, PH4 and H$3 are stable free radicals, and that local minima exist for H30 and H2Cl. The tendency of MNDO to overestimate the stability of such systems is traced to its neglect of overlap integrals. Results for Hz (both ground

A finite field method for calculating mo
โœ Dennis M. Elking; Lalith Perera; Robert Duke; Thomas Darden; Lee G. Pedersen ๐Ÿ“‚ Article ๐Ÿ“… 2011 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 437 KB

A finite field method for calculating spherical tensor molecular polarizability tensors ฮฑ(lm;l'm') = โˆ‚ฮ”(lm)/โˆ‚ฯ•(l'm')\* by numerical derivatives of induced molecular multipole ฮ”(lm) with respect to gradients of electrostatic potential ฯ•(l'm')\* is described for arbitrary multipole ranks l and l'. Int