EFFECTS OF ALKYL CHAIN LENGTH ON MOLECULAR INTERACTIONS. I. SOLID COMPLEX FORMATION IN THE PYRENE-N-ALKYL-2,4,6-TRINITROANILINE SYSTEMS.

Article abstract of DOI:10.1246/bcsj.57.1058

Phase diagrams were prepared for the fifteen binary systems consisting of pyrene as an electron donor and N-alkyl-2,4,6-trinitroanilines as electron acceptors. The thermal stability of the orange 1:1 complex between pyrene and the unsubstituted 2,4,6-trinitroaniline (mp 236 degree C) is drastically decreased by N-alkylation; e. g. , the N-pentyl-2,4,6-trinitroaniline complex melts at 97 degree C. The systems with the N-hexyl and N-heptyl derivatives give two peritectics each, while most of the higher homologues produce a single peritectic or a eutectic. Unstable red solids were formed on rapid cooling of the molten pyrene-N-hexyl-2,4,6-trinitroaniline mixtures.