The preparation, isolation and stability in solution of two different counter-ion free host-guest complexes are reported. These compounds are formed by two equally charged species, the doubly opposite-charged viologen guest and anti-disulfo-dibenzo[24]crown-8 ether host, giving rise to 1:1 neutral ion-paired supramolecular systems which can adopt different geometries, in solution and in solid state, depending on the relative orientation of their components. These results are only consequence of their intrinsic stability and allowed us to establish their co-conformational preferences. 

Co-conformational isomerism in a neutral ion-paired supramolecular system

245th National Meeting (2013)

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