I I1 I11 check this possibility, o-diazidobenzene was allowed to decompose in hexadecane solution containing anthracene. If benzyne is formed in the decomposition, it should be trapped by its Diels-Alder reaction with anthracene to give tryptycene. 2 However, when the reaction was worked up no tryptycene could be isolated. Instead the reaction yielded recovered anthracene and two colorless solids with melting points of 187O (A) and 129"(B ...