Das Reduktionsverhalten von Pentacarbonylpyridin-Komplexen des Chroms, Molybdäns und Wolframs

The reduction behaviour of pentacarbonylpyridinechromium, -molybdenum and -tungsten complexes

  • The reduction of group VIB metal pentacarbonyl complexes and of iodomethylates of 4- trimethylsilyl-, 4-acetyl- and 4-cyanopyridine has been investigated. Informations on the dissociation of the complexes and on the potential and reversibility of the one-electron reduction were obtained by cyclic voltammetry in DMF, whereas electron spin resonance (ESR) studies of the primary reduction products in the 4-acetylpyridine series revealed the distribution of the unpaired electron. The results suggest that the lowest unoccupied molecular orbital (LUMO) is a ligand centered π*-orbital in the 4-acetyl- and 4-cyanopyridine complexes, thus confirming assignments from photochemistry. The results allow an assessment of both N-coordination and substituent effects at the heterocyclic ligand.

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Metadaten
Author:Wolfgang KaimORCiDGND
URN:urn:nbn:de:hebis:30:3-719789
DOI:https://doi.org/10.1515/znb-1984-0620
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:1984
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2024/01/10
Tag:Carbonyl Complexes; ESR Spectra; Electrochemistry; Molecular Orbitals; Substituent Effects
Volume:39.1984
Issue:6
Page Number:7
First Page:801
Last Page:807
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):License LogoCreative Commons - Namensnennung-Nicht kommerziell-Keine Bearbeitung 3.0