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Molecules 2016, 21(8), 1079; doi:10.3390/molecules21081079

σ-Bond Electron Delocalization in Oligosilanes as Function of Substitution Pattern, Chain Length, and Spatial Orientation

1
Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, A-8010 Graz, Austria
2
Institut für Chemie, Karl Franzens Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
*
Authors to whom correspondence should be addressed.
Academic Editor: Mitsuo Kira
Received: 21 July 2016 / Revised: 3 August 2016 / Accepted: 4 August 2016 / Published: 18 August 2016
(This article belongs to the Special Issue Advances in Silicon Chemistry)

Abstract

Polysilanes are known to exhibit the interesting property of σ-bond electron delocalization. By employing optical spectroscopy (UV-vis), it is possible to judge the degree of delocalization and also differentiate parts of the molecules which are conjugated or not. The current study compares oligosilanes of similar chain length but different substitution pattern. The size of the substituents determines the spatial orientation of the main chain and also controls the conformational flexibility. The chemical nature of the substituents affects the orbital energies of the molecules and thus the positions of the absorption bands. View Full-Text
Keywords: oligosilanes; σ-bond electron delocalization; UV-spectroscopy; single crystal diffraction analysis oligosilanes; σ-bond electron delocalization; UV-spectroscopy; single crystal diffraction analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hlina, J.; Stella, F.; Aghazadeh Meshgi, M.; Marschner, C.; Baumgartner, J. σ-Bond Electron Delocalization in Oligosilanes as Function of Substitution Pattern, Chain Length, and Spatial Orientation. Molecules 2016, 21, 1079.

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