4f Gadolinium(III) Complex Involving Tetrathiafulvalene-amido-2-pyrimidine-1-oxide as a Ligand

A coordination gadolinium(III) mononuclear complex involving the new redox-active tetrathiafulvaleneamido-2-pyrimidine-1-oxide is synthesized. The X-ray structure of the 1:3 gadolinium complex [Gd(hfac)3(TTF-CONH-2-Pym-1-oxide)3](CH2Cl2)·0.5C6H14 reveals that the coordination polyhedron of the paramagnetic 4f (S = 7/2) GdIII ion can be described as a 4,4,4-tricapped trigonal prism. The three-coordinated TTF derivatives adopt a fac conformation with a pseudohelicoidal arrangement. A radical-cation salt of this new ligand is reported. Such a coordination complex is an innovative building block for the π−f system and the introduction of new physical properties.