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.
Variable bases in SCF MO calculations
β Scribed by R. Moccia
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 348 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
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 proposed.
π SIMILAR VOLUMES
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
## 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
Ab initio SCF !\_CAO MO calculations, using gaussian-type functions and large basis sets with ncnr Hartree-Fock accuracy, have been carried out for the ground state of the permnnganate ion. The largest calculation performed ap plied 203 primitive gaussians.