Radikalionen, 81. ENDOR-spektroskopische Untersuchungen an Radikalkationen aromatischer Organoschwefel-Verbindungen
Radical ions, 81. ENDOR spectroscopic investigations of radical cations of aromatic organosulfur compounds
- Conditions for ENDOR measurem ents of organosulfur radical cations are discussed and tested. The one electron oxidation of a variety of aromatic sulfur com pounds comprising benzene-1,2-dithiole, 1,4-dithiine, thianthrene and diphenylsulfide derivatives as well as 33S isotope-marked bis(2,5-dimethoxyphenyl)disulfide is accomplished using the oxygen-free, powerful and selective AlCl3/H2CCl2 reagent. Partly with substantial structural changes, paramagnetic M⊕ species of 1,2-benzodithiete, 1,4-dithiine, thianthrene and diphenyl sulfide result. Their temperature-dependent ENDOR signal patterns provide numerous information e.g. on radical cation structure and dynamics, on the rather high sulfur spin populations or on the spin rotation interaction dominated relaxation behaviour. Accordingly, to obtain optimum ENDOR effects in organosulfur radical cations low temperature measurements are required, and especially for still undiscovered 33S ENDOR couplings, small g factor anisotropies and 33S spin densities appear to be necessary.
Author: | Hans BockGND, Bernhard HierholzerGND, Peter RittmeyerGND |
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URN: | urn:nbn:de:hebis:30:3-809335 |
DOI: | https://doi.org/10.1515/znb-1989-0216 |
ISSN: | 1865-7117 |
ISSN: | 0932-0776 |
Parent Title (German): | Zeitschrift für Naturforschung, B |
Publisher: | Verlag der Zeitschrift für Naturforschung |
Place of publication: | Tübingen |
Document Type: | Article |
Language: | German |
Date of Publication (online): | 2014/06/02 |
Year of first Publication: | 1989 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2024/01/22 |
Tag: | ENDOR (Special; General Triple) Spectra; Molecular Dynamics; Organosulfur Radical Cations; Structural Changes; Temperature Dependence |
Volume: | 44.1989 |
Issue: | 2 |
Page Number: | 18 |
First Page: | 187 |
Last Page: | 204 |
Institutes: | Biochemie, Chemie und Pharmazie / Biochemie und Chemie |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Sammlungen: | Universitätspublikationen |
Licence (German): | Creative Commons - Namensnennung-Nicht kommerziell-Keine Bearbeitung 3.0 |