An ab initio study of simple 1,3-cyclodisiloxane derivatives

Árpád Somogyi, József Tamás, A. Császár

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Ab initio geometry optimizations on some simple cyclodisiloxane derivatives (R2SiO)2 (R=CH3, OH and OCH3) and on their radical cations have been carried out at the restricted Hartree-Fock (RHF) level using the basis set 3-21G*. Mayer's bond orders and valences have been calculated for all these species using the STO-3G* basis set, employing geometries determined at the RHF/ 3-21G* level. It was found that the geometries of the neutral and charged species are quite different, but the geometry of the ring and Mayer's bond indices are affected relatively slightly by the substituents. The small but characteristic Si⋯ Si bond orders in neutral cyclodisiloxanes indicate a weak Si⋯Si bond. While this bond is considerably weaker in the molecular ions, the O⋯O bond orders are increased in the charged species.

Original languageEnglish
Pages (from-to)123-131
Number of pages9
JournalJournal of Molecular Structure: THEOCHEM
Volume232
Issue numberC
DOIs
Publication statusPublished - Jul 26 1991

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Cations
Ions
Derivatives
Geometry
geometry
molecular ions
Positive ions
valence
cations
optimization
rings

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Computational Theory and Mathematics
  • Atomic and Molecular Physics, and Optics

Cite this

An ab initio study of simple 1,3-cyclodisiloxane derivatives. / Somogyi, Árpád; Tamás, József; Császár, A.

In: Journal of Molecular Structure: THEOCHEM, Vol. 232, No. C, 26.07.1991, p. 123-131.

Research output: Contribution to journalArticle

Somogyi, Árpád ; Tamás, József ; Császár, A. / An ab initio study of simple 1,3-cyclodisiloxane derivatives. In: Journal of Molecular Structure: THEOCHEM. 1991 ; Vol. 232, No. C. pp. 123-131.
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