Non-covalent intramolecular Dy···F interactions in tris(pentafluorophenyl)methanolate dysprosium(III) complexes

The reactions of (C₆F₅)₃COH with (o -Me₂NC₆H₄CH₂)₃Dy affords two new Dy³⁺ tris(alkoxy) complexes isolated in the form of pyridine and NMe₃ adducts [(C₆F₅)₃CO]₃Dy(L)_n (L = py, n = 2 and L = Me₃N, n = 1). The first complexes adopts trigonal bipyramidal geometry while the second one is and almost ideal trigonal pyramidal. A characteristic feature of the latter formally four-coordinate complex is the presence of non-covalent intramolecular Dy⋯F interactions with each of (C₆F₅)₃CO^- ligands reflected in short contacts, while in the former five-coordinate complex, such interactions were not detected.