Supramolecular association of M2+⋯π induced by different electrostatic properties using naphthyl substituted β-diketonate complexes (metal = Cu, Pd, Pt)†
Abstract
Expanded π-conjugated coordination complexes, [M(L2)2] (M = Cu2+, Pd2+, and Pt2+; L2 = dinaphthoylmethanido−), were prepared and the different metal characteristics were found due to the supramolecular associations: [Cu(L2)2] shows a remarkable M2+⋯π interaction (3.249 Å) inducing the cationicity of Cu2+ and the strength of the interactions clearly decreases for the Pd2+ and Pt2+ ions (3.785 and 4.610 Å), indicating their electron-rich and nucleophilic characteristics.