Results of a study of pyridine oriented in a nematic phase in the presence of the lanthanide shift reagent, tris (dipivalomethanato) europium(III) are reported. The shift reagent does not appear to affect the pyridine geometry. The isotropic and anisotropic parts of the lanthanide induced shifts are reported.
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ACKNOWLEDGMENTS We wish to thank the following for very helpful discussions, ideas and support: Professors P. Diehl, F. G. Herring, C. A. McDowell, and A. G. Marshall, Drs. W. Niederberger and C. S. Yannoni and Mr. J. Vogt ; we also wish to thank a referee for helpful comments. The financial support of the National Research Council of Canada is gratefully acknowledged.