IR spectroscopic study in polarized light of a series of thermally treated nitrile polymers

Concerning the chemical structure of the dicyanogen photopolymer and its presence in certain bodies of the Solar system. Implications on the synthesis of some prebiotic molecules

“…Hence, if formed, on standing at room temperature or during work-up they should undergo cyclization to form a ladder structure (Scheme 1, structure [D]). This kind of cyclization reaction is well known and has already been reported for the considerably more stable polyacrylonitrile when it is heated at 160-300 mC, forming a ladder polymer known as ' black orlon ' (Klimenko et al 1991). The electronic spectrum reported in Fig.…”