Synthesis of 2,3,5,6-tetrahydro-1h,4h,11ch-3a,6a,11b-triazabenz[de] anthracene (5) and x-ray crystal structure determinations of (5), hexahydro-1h,4h,7h,9bh-3a,6a,9a-triazaphenalene (1), benzo[b]-1,5,9-triazadodecane n,n',“n-tritosylamide, and of 1,5.9-triazadodecane n,n',n”-tritosylamide

Abstract The synthesis of 2,3,5,6-tetrahydro-1H,4H,11cH-3a,6a,11b-triazabenz [de]anthracene (5) is described. X-ray crystal structure deteminations on hexahydro-1H,4H,7H,9bH-3a,6a,9a-triazaphenalene (1) and its benzoanalogue (5) show them to adopt differing conformations; the reasons for this are discussed.