Title: Mono-, di-, tri- and tetraphosphatriafulvenes: Electronic structure and aromaticity
Authors: Holtzl, Tibor ×
Nguyen, Minh Tho
Veszpremi, Tamas #
Issue Date: Jun-2007
Publisher: Elsevier Scientific Pub. Co.
Series Title: Journal of Molecular Structure. Theochem vol:811 issue:1-3 pages:27-35
Conference: date:Budapest Univ Technol & Econ, Dept Inorgan & Analyt Chem, H-1111 Budapest, Hungary; Univ Louvain, Dept Chem, B-3001 Louvain, Belgium
Abstract: Aromaticity and electronic structure of triafulvenes containing 1, 2, 3 and 4 phosphorus atoms were studied using Density Functional Theory computations. It was found that the donor-acceptor interaction between the "filled" ring- and "empty" exo-Lewis-pi orbitals is a good criterion for the aromaticity of triafulvenes. Although phosphorus is less electronegative than carbon, the exo-phosphorus increases, whereas the ring-phosphorus decreases the aromaticity. We have shown that the aromatic stabilization effect of the exo-phosphorus is larger than the destabilization of the ring-phosphorus. The final order of the aromaticity, compared with some reference compounds is cyclopropenone > 4-silatriafulvene approximate to 4-phosphatriafulvene > 1,4-diphosphatriafulvene > methylenecyclopropene > 1-phosphatriafulvene > 1,2,4-triphosphatriafulvene > 1,2-diphosphatriafulvene > 3,4-diphosphatriafulvene > 1,2,3,4-tetraphosphatriafulvene. The two last compounds are non-aromatic, ylidic structures. (c) 2007 Elsevier B.V. All rights reserved.
ISSN: 0166-1280
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Quantum Chemistry and Physical Chemistry Section
× corresponding author
# (joint) last author

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