Novel spin–spin hydrogen–fluorine couplings have been observed between the axial 3-H pyrazolyl ring hydrogen and the fluorine nuclei of some five co-ordinate fluoro-olefin complexes; these couplings may arise from through-space interactions.
H. C. Clark and L. E. Manzer, J. Chem. Soc., Chem. Commun., 1973, 870 DOI: 10.1039/C39730000870
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