국가지식-학술정보
Contact-Only and Dipolar-Only Mixtures of Lanthanide NMR Shift Reagents
Contact-Only and Dipolar-Only Mixtures of Lanthanide NMR Shift Reagents
- 대한화학회
- Bulletin of the Korean Chemical Society
- Vol.7 No.6
-
1986.01433 - 438 (6 pages)
- 0
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Two new types of NMR shift reagents, one giving dipolar-only and the other giving contact-only shifts, can be prepared simply by mixing two appropriate $Ln(fod)_3$(Ln = Pr, Nd, Eu, and Yb) reagents in certain ratios. The $^1H$ and $^{13}C$ NMR spectra of pyridine-type substrates, quinoline and isoquinoline, whose paramagnetic shifts are normally a composite of contact and dipolar contributions with single lanthanide shift reagents, show the feasibility of this approach.
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