The high-pressure behavior of nitrogen-based binary compounds has been the subject of exciting and extensive investigations in the last decade. Despite all studies done on high-pressure nitrogen-based binary compounds, one group of elements has been left completely untouched: halides. This might appear as surprising given that these unique elements are expected to give radically different results than those observed with previous binary compounds. This talk will be focused on my recent investigation of the iodine-nitrogen system up to 120 GPa and 3000 K, for which I employed laser-heated diamond anvil cells. The reaction products between these two elements were determined from synchrotron single-crystal X-ray diffraction. Of particular importance, one of the hitherto unknown compounds that were discovered feature a previously unseen nitrogen species.