Radiation destruction of DCH18C6·BaCl2 complexes is localized on macrocyclic moiety.
Syn/anti stereoisomerism is critical point for radiation stability of macrocycle.
Cis-syn-cis-DCH18C6·BaCl2 is more resistant to radiation cleavage of macrocycle.
Intermediates from degradation of chloride-anion were not found.