Citation: Mahmoudi, Ghodrat; Morsali, Ali (2007). Counter-ion influence on the coordination mode of the 2,5-bis(4-pyridyl)-1,3,4-oxadiazole (bpo) ligand in mercury(ii) coordination polymers, [Hg(bpo)nX2]: X = I--, Br--, SCN--, N3-- and NO2--; spectroscopic, thermal, fluorescence and structural studies. CrystEngComm, 9, pp. 1062-.