Semi-cmpiriwl SCF calculntions fCNDO/7-) of the trigonnl-bipyramidal molecule ClOzF3 proved the Czv cont$,uration to hnvc the highest strtbilizntion, in accord wiih empirical rules, and with an interpretation of the IR sFecrntm of :1 wry recent first preparation of th!; compound. 1. lritroduction Qu
Mo scf calculations on isocyanates
β Scribed by B.M. Rode; W. Kosmus; E. Nachbaur
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 240 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Calculations on some isocyanates h3~1! been performed by rnwn5 of semi-anpiric;ll hl0 methods (CNDO/Z). The NC0 group is found to be nonlinear, in agreement with recent esperimcntai results. Energies, charge densities and bond indices are dkcussd in relation to the stability of these compounds.
π SIMILAR VOLUMES
## Rcccivcd 10 Xovcmbcr 1069 Explicit expressions derived for the first. second and third derivatives of the SCF energy with respect to par:imcters which cnn be contxincd both in the one clcctron part of the Hamiltoninn nnd esplicitly in the basis functions. Scvcrnl useful applications arc propose
Ab initio SCF MO calculations with gauss&-type orbit& have been '@formed on the perchlorate ion. The results correlate very well with those obtained from recent photoe~ec~on spectra, and they have been compared to remulti Llomputed u&g the &attered-wave method. The influence of chlorine 3d orbit& in
## Abstract It is shown that up to 50% of the computer time needed for geometry optimization on the (semiempirical) CI level by means of gradients calculated as finite differences can be saved by using βcorrected noncentral gradientsβ in combination with a judiciously chosen first estimate of the H