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Radical Ions in the Pentalene Series. Part. I. 1,3,5-tri-t-butylpentalene

Fürderer, Peter ; Gerson, Fabina ; Hafner, Klaus (2022)
Radical Ions in the Pentalene Series. Part. I. 1,3,5-tri-t-butylpentalene.
In: Helvetica Chimica Acta, 1978, 61 (8)
doi: 10.26083/tuprints-00022407
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Radical Ions in the Pentalene Series. Part. I. 1,3,5-tri-t-butylpentalene
Language: English
Date: 2022
Place of Publication: Darmstadt
Year of primary publication: 1978
Publisher: Wiley-VCH
Journal or Publication Title: Helvetica Chimica Acta
Volume of the journal: 61
Issue Number: 8
DOI: 10.26083/tuprints-00022407
Corresponding Links:
Origin: Secondary publication service

The ESR. spectra of the radical anion and cation of 1, 3, 5-tri-t-butylpentalene (II) have been reexamined under higher resolution. With the assistance of the ENDOR. technique, the coupling constants of all protons in II⁻. and II⁺. could be determined. The experimental data agree satisfactorily with the values predicted by the simple MO model which suggests that the π-spin distributions in II⁻. and II⁺. should not strongly differ from those in the corresponding radical ions of parent pentalene (I). As in the case of other non-alternant hydrocarbons, the proton coupling constants for II⁻. are very sensitive to experimental conditions, due to the association of the radical anion with its counterion. Spectra of II⁻. taken at low temperatures (down to 133 and 163 K for ESR. and ENDOR., respectively) have not revealed specific line-broadening which could arise from the bond shift between the two Kekulé-structures of pentalene.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-224072
Classification DDC: 500 Science and mathematics > 540 Chemistry
Divisions: 07 Department of Chemistry > Clemens-Schöpf-Institut > Organ Chemistry
Date Deposited: 28 Nov 2022 09:19
Last Modified: 21 Apr 2023 12:55
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/22407
PPN: 507160843
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