Paradigms and paradoxesPerisanu, Stefan (Avtor) Ponikvar-Svet, Maja (Avtor) Edwards, Kathleen F. (Avtor) Liebman, Joel F. (Avtor) diglycinetriglycinenitrilotriacetic acidThe current paper discusses the enthalpy of formation of triglycine. Upon asking “What is the enthalpy of formation of triglycine?”, we find that there are two non-isomeric species that are generally referred to as “triglycine”: glycylglycylglycine and nitrilotriacetic acid. In the current paper the enthalpies of formation of these two species termed "triglycines" are discussed and related to each other. In addition, a similar analysis is carried out for the related “diglycines”.Springer Nature20262026-09-02 13:36:23Neznano32251sl© The Author(s) 2025