Highly flexible O,O′,N ligands and their Fe, Ni, Cu and Zn complexes

► New highly flexible and chiral terdentate O,O',N ligands (OmethoxyOhydroxyNpyridine) coordinated to FeIII, NiII, CuII and ZnII. ► Structural study in the solid by XRD, EXAFS and EPR and in solution by UV-Vis absorption, cyclic voltammetry, EXAFS, EPR and NMR spectroscopy. ► Weak (hemilabile) Omethoxy coordination.