Crystal structure of the co-crystal N,N′-bis(4-pyridylmethyl)oxalamide and 2,3,5,6-tetrafluoro-1,4-di-iodobenzene (1/1), C14H14N4O2⋅C6F4I2 - Tan, Sang Loon *; Tiekink, Edward R. T. * (De Gruyter Open, 2019)