The 15N n.m.r. spectra of fbpy (4-fluoro-2,2′-bipyridine), [Fe(bpy)3]2+, cis-[Co(bpy)2(H2O)2]3+, and a 3 : 1 mixture of mer- and fac-[Fe(fbpy)3]2+, are reported; in the case of mer-[Fe(fbpy)3]2+, the lack of symmetry makes all six nitrogen atoms non-equivalent and this non-equivalence is confirmed by 15N n.m.r. spectroscopy.
A. F. Janzen, T. Q. Nguyen, F. Qu and K. Marat, J. Chem. Soc., Chem. Commun., 1988, 1274 DOI: 10.1039/C39880001274
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