Co2(CO)6-induced deformation of alkynes as a reversible modulator of supramolecular interactions: controlling the synthesis of catenanes

Abstract

Complexation of Co₂(CO)₆ clusters to the alkyne bonds of a hybrid crown macrocycle alters the dimensions of the macrocyclic cavity such that inclusion complexation and catenane formation by catalytic ring closing metathesis is prevented; since removal of the Co₂(CO)₆ ‘protecting group’ is readily achieved, this procedure provides a general method for modulation of supramolecular interactions.