“…For M = Hg two modifications, one cyanamide and one carbodiimide, are known , . Interestingly, some of these compounds show potential applications as negative electrode materials for lithium and sodium ion batteries, corrosion protective layers, photovoltaic devices, fluorescent light sources, and light‐emitting diodes , . Due to the carbodiimide anion being a pseudo‐chalcogenide anion, it can act as a bridging ligand to allow effective magnetic super exchange between bridged paramagnetic cations, as seen for Cr 2 [CN 2 ] 3 and M [CN 2 ] ( M = Mn – Cu), which are isostructural to their respective oxide variants, exhibit similar magnetic ordering and also have the same colours .…”