Crystal structures of four 1-(aryl)-[1,2,4]triazolo[4,3-a]quinoxaline derivatives

1-Aryl-[1,2,4]triazolo[4,3-a]quinoxaline derivatives, prepared by oxidation of 2-(benzylhydrazonyl)-quinoxalines using ferric chloride, exhibit similar molecular conformations, but differing supramolecular arrangements.