Green, R. W. published the artcileThermodynamics of chelation. I. Iron (II) and zinc (II) complexes of pyridine-2-carboxaldehyde 2′-pyridylhydrazone, Computed Properties of 2215-33-0, the publication is Australian Journal of Chemistry (1968), 21(5), 1165-73, database is CAplus.
In dilute solution, pyridine-2-carboxaldehyde 2′-pyridylhydrazone can behave as a diacid base or as a tridentate chelating agent. Its cationic bis complexes further undergo 2 stages of deprotonation. Equilibrium constants were measured at 7 temperatures from 5° to 60° and over a range of ionic strength. They have been used to derive values of enthalpies and entropies of reaction with H+, Fe2+, and Zn2+.
Australian Journal of Chemistry published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, Computed Properties of 2215-33-0.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem