Formation of Inclusion Organoactinide Complexes with Boron-Containing Macrocycles

Reaction of the organoactinide complexes (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>AnMe<sub>2</sub> (An = Th, U) with catecholborane yields an inclusion complex where the actinide is encapsulated inside a 15-membered, hexaoxo, trianionic macrocycle built from alternating catechol and catecholborate fragments. In the presence of LiOH, a dimer of two encapsulated actinide macrocycles is formed. The X-ray molecular structure for all the complexes is presented.