Scheme 1. (Top) One-Step Synthesis of the Salen-Type LigandH2L, Monometallic ComplexesNiL and the Heterobimetallic CongenerCeNiL, the NO3– Anions of CompoundCeNiL as well as the Crystal Water Molecules of the Applied Ni and Ce Salt Are Omitted in the Drawings for the Sake of Simplicity; (Bottom) Molecular Structure of DinuclearCeNiL as Determined by Single Crystal X-ray Diffraction Analyses, the Axial Ligands That Are Linked to the Ni Center Stem from the Crystal Water in the Applied Nickel Precursor, and the Thermal Ellipsoids Were Drawn up to the 50% Probability Level and the H Atoms Are Omitted for Clarity.
