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Near UV Spectroscopy and Electronic Structure of Dibenzo-p-dioxin, the Parent Compound of Highly Food-Polluting Agents
Vidal, B. Near UV Spectroscopy and Electronic Structure of Dibenzo-p-dioxin, the Parent Compound of Highly Food-Polluting Agents Chemical Papers, Vol.57, No. 2, 2003, 112-118
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Attached Files |
| Name |
Description |
MIMEType |
Size |
Downloads |
n572a112.pdf
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572a112.pdf |
application/pdf |
172.17KB |
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| Author(s) |
Vidal, B.
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| Title |
Near UV Spectroscopy and Electronic Structure of Dibenzo-p-dioxin, the Parent Compound of Highly Food-Polluting Agents
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| Journal name |
Chemical Papers
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| Publication date |
2003
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| Year available |
2003
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| Volume number |
57
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| Issue number |
2
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| ISSN |
0366-6352
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| Start page |
112
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| End page |
118
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2003
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| Language |
english
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| Subject |
290000 Engineering and Technology
290100 Industrial Biotechnology and Food Sciences
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| Abstract/Summary |
Dibenzo- p -dioxinshows the first π-bond-order alternation observedwhen a six-membered ring is fused to a benzene moiety. This is particularlynoticeable because the presence of phenolic oxygens in the molecule, and anincreasing conjugation, should tend to quench alternation, when alternation is possible.Actually, oxygens tend to induce a quinodimethane-like structure. Alternationin dibenzo p-dioxin is explained firstly on the basis of that the two phenolicoxygens have to share their pπ - electronswith two benzene moieties, which decreases their effects towards each other. This limits their quenching ability. Alternation is explained secondly on thebasis of the fact that strain, which distorts the bridgehead bonds, inducingalternation, is increased compared to benzodioxan. Intensity calculations usingthe Interaction Vector Model, and the above electron-structure calculations, leadto results that fit with experiment. This shows that electron-structurebehaviour is understood.
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