Novel nitrogen‐rich compound featured bicyclic quinoxaline as a basic core structure has been synthesized, 1‐{[1‐(3‐azido‐2‐hydroxypropyl)‐1H‐1,2,3‐triazol‐4‐yl]methyl}‐3‐methyl‐1,2‐dihydroquinoxalin‐2‐one with formula C15H16N8O2, and their structural and chemical reactivity aspects have been comprehensively discussed. Nature, role, and relative contribution of weak noncovalent interactions in supramolecular assembly have been assessed through single‐crystal analysis and computational approaches. Useful information about the global and local reactivity were obtained from Conceptual Density Functional Theory at wB97X‐D/cc‐pVDZ level. Studied system could act as strong electrophile and/or moderate nucleophile in polar organic reactions. We hope this study will provide deeper insight in the knowledge of the synthesis and chemistry of the quinoxaline and quinoxaline derivatives.