`0'- and `8'-shaped complexes generated from a nano-sized oxa­diazole-containing organic ligand with CdI₂ and CuI

The new nano-sized rigid double-armed oxa­diazole-bridged ligand 2,5-bis­{2-methyl-5-[2-(pyridin-3-yl)ethen­yl]phen­yl}-1,3,4-oxa­diazole has been used to create two novel metallocyclic complexes with one adopting a 20-membered `0'-shaped metallocyclic structure and the second adopting a discrete `8'-shaped metallocyclic structure.