Title
Positive ions of <tex>$SiH_{4}$</tex> : Jahn-Teller-like distortions for <tex>$SiH_{4}^{+}$</tex> and eventually molecular collapse on further ionisationPositive ions of <tex>$SiH_{4}$</tex> : Jahn-Teller-like distortions for <tex>$SiH_{4}^{+}$</tex> and eventually molecular collapse on further ionisation
Author
Faculty/Department
Faculty of Sciences. Chemistry
Faculty of Sciences. Physics
Research group
Structural chemistry group
Department of Physics
Publication type
article
Publication
Basel,
Subject
Mathematics
Chemistry
Source (journal)
Journal of mathematical chemistry. - Basel
Volume/pages
51(2013):1, p. 117-124
ISSN
0259-9791
ISI
000312907600008
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We have recently studied by quantum-chemical calculations some fifteen tetrahedral and octahedral molecules. These seemingly disparate numerical tabulations were, it was demonstrated, pulled together by comparison with model semiclassical scaling laws for (i) nuclear-nuclear repulsion energy at the equilibrium geometry and (ii) total energies likewise. Here, we again appeal to such model scaling predictions, but now for positive ions of SiH4. We then report Hartree-Fock equilibrium geometries and MP2 corrections. For , we assumed the symmetry to be C-2v , by analogy with for which experimental confirmation of this symmetry is available. Larger distortions, but still for C-2v symmetry, are found from our quantum-chemical studies in the case of . But for there is a marked tendency to return to a configuration quite close to tetrahedral symmetry. But non-convergence is found for . Finally relations to the admittedly simplistic semiclassical geometry scaling predictions of Lawes and March are conjectured.
E-info
https://repository.uantwerpen.be/docman/iruaauth/0d58ce/7d63637.pdf
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