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Nuclear magnetic resonance contact shifts and delocalization mechanisms in Ni(II)‐dioxo complexes

F.W. Pijpers, H. E. Smeets, Lucas B. Beentjes

Abstract

Abstract The temperature dependence of the proton NMR‐spectra of bis(1,3‐diphenyl‐1,3‐propanedionato)Ni(II) and of bis(1,3‐di‐p‐tolyl‐1,3‐propanedionato)Ni(II) has been determined. We have interpreted the results using a model with two unpaired electrons per molecule. We conclude that the contact shifts of the various proton resonance signals result from delocalized unpaired electrons in the σ as well as the π system of the ligands.

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Available abstract

Key concepts: Delocalized electron, Unpaired electron, Electron, Molecule, Proton, Electron delocalization, Chemistry, Spectral line