NMR and MS analysis as a function of time has shown that the self-assembly of a linear ligand with Fe2+ or Ni2+, metal ions of octahedral coordination geometry, generates first a triple helicate and thereafter the circular helicate 1 as kinetic and thermodynamic products, respectively. The results provide insight into features of the energy hypersurface on which this self-assembly operates and point to the general role of kinetic and thermodynamic control in such processes.
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Hasenknopf et al. (1998) studied this question.
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