Proton magnetic shielding and susceptibility effects in single crystals of 
ferrocene

Spiess, Hans W.; Haeberlen, Ulrich; Zimmermann, Herbert

doi:10.1016/0301-0104(76)80118-8

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Proton magnetic shielding and susceptibility effects in single crystals of ferrocene

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Spiess, Hans W.
Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society;

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Haeberlen, Ulrich
Research Group Prof. Dr. Haeberlen, Max Planck Institute for Medical Research, Max Planck Society;

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Zimmermann, Herbert
Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society;
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;
Zimmermann Group, Max Planck Institute for Medical Research, Max Planck Society;
Emeritus Group Biophysics, Max Planck Institute for Medical Research, Max Planck Society;

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Citation

Spiess, H. W., Haeberlen, U., & Zimmermann, H. (1976). Proton magnetic shielding and susceptibility effects in single crystals of ferrocene. Chemical Physics, 12(1), 123-130. doi:10.1016/0301-0104(76)80118-8.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-B149-A

Abstract

The proton NMR in single crystals of ferrocene has been studied by multiple pulse techniques at room temperature. In crystals of natural shape with plane faces the angular dependence of the resonance frequency due to the anisotropy of the shielding and due to the bulk susceptibility was found to be of about equal size, making analysis of the data practically impossible. By using a single crystal sphere the shape dependent part of the susceptibility contribution could be eliminated. In addition, the resolution obtained by the multiple pulse technique is considerably higher for spheres than for non−spherical crystals. As the ferrocene molecules rotate rapidly about their fivefold axes at room temperature, the shielding tensor ς must be axially symmetric