Mechanism of interaction of polyethylene polyamides with sulfuric acid in aqueous media

Conclusions Del Re's molecular orbital technique is used to show that in titrating diethylenetriamine against H₂SO₄ in aqueous media the primary amino groups are neturalized first and then the secondary amino groups. The observed amino group titration sequence is determined by the magnitude of the negative charge on the nitrogem atom.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2639–2640, November, 1968.