Isolation of a Stable Covalent Selenium Azide RSeN₃

The first covalent selenium azide 2-Me₂NCH₂C₆H₄SeN₃ has been synthesized and fully characterized including crystal structure determination. As shown by the experimental results, the relative stability of RSeN₃ highly depends on the nature of the coordinating ability of the substituent R, resulting in a heterocyclic zwitterionic structure.