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

The reaction of YbI2(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.