Distinctive features of the structure of hemihexaphyrazine complexes with Y, La, and Lu according to quantum chemical data

The value of the lanthanide contraction ΔrLn (0.208 Å) in the examined LnHp complexes with one ligand has been determined, which turned out to be close to ΔrLn values in the series of lanthanide halogenides with three monovalent ligands and in the series of lanthanide compounds with three bidentate ligands.