Abstract

AbstractThe racemization/symmetrization of helicate‐ or meso‐helicate‐type dinuclear titanium(IV) complexes Mn[(ligand)3Ti2] (n = 4: M = Li, Na, K, Cs; n = 2: M = Ca, Sr), which are formed by metal‐directed self‐assembly of alkyl‐bridged bis(catecholate) ligands in the presence of basic alkali‐metal or alkaline‐earth metal salts, can be monitored by dynamic NMR spectroscopy. The free‐energy barrier (ΔG‡) of this process is influenced by the nature of the ligand, the solvent, and the counterion.

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