Cyclic Di- and Mixed-Valent Ytterbium Complexes Supported by Dipyrrolide Ligands

The reaction of YbI 2 (THF) 2 with diphenyldipyrrolylmethanide leads to a complex reaction from which an octameric divalent Yb macrocyclic complex, [diphenyldipyrromethanediyl-Yb] 8, was obtained as a major product. A tetrameric cyclic Yb(II)-oxo complex, [(diphenyldipyrrolylmethanediyl)Yb] 4 [(K(THF) 3 ] 2 (μ-O)·2(THF), arising from solvent deoxygenation and a monomeric Yb(III) complex, Yb(diphenyldipyrrolylmethanediyl) 3 [K(THF)] 3, were also isolated as byproducts of a complex reaction.