マロンニトリルの三量体

アセトニトリルの熱分解(その3)

抄録

Treatment of malononitrile in aqueous alkaline solutions afforded a dimer and a trimer depending on the reaction conditions. The dimer was identified as 1, 1, 3-tricyano-2-aminopropene(1). The trimer was found to be identical with “trismalononitrile I” of Schenck et al., and the structure was established to be 2, 4-diamino-3, 5-dicyano-6-cyanomethylpyridine(3) by the IR, mass, and MNR-spectra.
The structure of “trismalononitrile II” of Schenck et al., was identified as ammonium salt of 1, 1, 3, 3-tetracyano-2-cyanomethylpropene(2), although Anderson et al., had reported it to be 2, 4-dicyanomethyl-5-cyano-6-amino-pyrimidine(5) and defined it as “the unstable form against heat.”