Monocarbaborane anion chemistry. An interesting encapsulation of the Pd2I2{P(C6H4-4-Me)3}4]2+cation by a pair of [PhCB9H4I(C6H4Me)4]− anions

Abstract

Reaction of the [1-Ph-closo-1-CB₉H₄-6,7,8,9,10-I₅]⁻ anion with 4-MeC₆H₄MgBr in the presence of [PdCl₂(PPh₃)₂] gives the [Pd₂I₂{P(C₆H₄-4-Me)₃}₄]²⁺ salt of the [1-Ph-closo-1-CB₉H₄-10-I-6,7,8,9-(C₆H₄-4-Me)₄]⁻ anion, which exhibits an unusual neutral supramolecular assembly in the solid state, in which the dipalladium dication is encapsulated by two four-armed ‘tetrapus’ anionic units; the anion also has potentialities for four-fold dendrimer construction.