Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
The Contact-term Contributions to Lanthanide-induced 13C Paramagnetic Shifts in Acridine, Quinoline, and Isoquinoline
Masatoshi HirayamaYoshiaki Hanyu
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1973 Volume 46 Issue 9 Pages 2687-2690

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Abstract

1H and 13C paramagnetic shifts induced by Eu(DPM)3 and Pr(DPM)3 in acridine, quinoline, and isoquinoline in CCl4 are observed. It has been found that, while the 1H shifts can be interpreted solely in terms of a pseudo-contact interaction, there is a much larger contact-term contribution to 13C shifts induced by Eu(DPM)3 than by Pr(DPM)3 in these compounds; this contribution to the 13C shifts cannot be explained by a simple combination of σ- and π-contact terms.

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