Thermodynamics of chelation. II. Iron(II) and zinc(II) complexes of 6-Methylpyridine-2-aldehyde 2'-pyridylhydrazone

Abstract

6-Methylpyridine-2-aldehyde 2?-pyridylhydrazone is a stronger base but weaker ligand than its parent, paphy. Equilibrium constants are reported for seven temperatures from 5° to 60° and over a range of ionic strength. The properties of the ligand are discussed in terms of the derived enthalpies and entropies of reaction.