With use of ring-substituted derivatives, the hyperfine shifted resonances have been assigned to specific ligand protons. The 'H NMR spectrum obtained for the monomer consists of relatively sharp peaks assigned to phenolate protons at -21.9 (5'-H) and -23.8 (4'-H) ppm and a broad resonance at +28.1 ppm that is assigned to the proton on the 2-carbon atom of the propane backbone. The resonance due to this last proton is absent from the spectrum of the dimer, which exhibits phenolate proton resonances at -3.4 (6'-H), -5.3 (4'-H), and -13.7 (5'-H) ppm. This information has allowed characterization of species in solution, including a trinuclear complex, [NaMnm2(2-OH-SALPN)2(OAc)4]~, which forms both the monomeric cation and dimer in solution.

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