KMR-Spektroskopie an paramagnetischen Komplexen, VI / NMR Spectroscopy on Paramagnetic Complexes, VI
Open Access
- 1 December 1974
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 29 (11-12) , 708-712
- https://doi.org/10.1515/znb-1974-11-1202
Abstract
The 13C PFT NMR and 1H CW NMR spectrum of bis(h5-t-butylcyclopentadienyl)vanadium were recorded, and the signals assigned. A distinct superiority of the 13C spectroscopy is shown. As the observability of these signals depends on the line width the influence of the electron-spin relaxation time τe on dipolar and contact broadening is analysed. It is found that both broadenings should be of similar size. Except for the ring carbon atoms of nickelocenes the 13C signals of paramagnetic metallocenes should be easy to observe. Using the 13C results dipolar as well as contact contribution to the experimentally found line width are separated, and τe is determined. From Te it is concluded that zero-field splitting does not essentially affect the electron-spin relaxation.Keywords
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