Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Contact-Only and Dipolar-Only Mixtures of Lanthanide NMR Shift Reagents

  • Lee, Man-Ho (Department of Industrial Chemistry, Kyungpook National University)
  • Published : 1986.12.20
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Abstract

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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