In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 128143-88-4, name is [2,2′:6′,2”-Terpyridin]-4′(1’H)-one, introducing its new discovery. Computed Properties of C15H11N3O
The keto-enol equilibrium between 2,6-bis(2?-pyridyl)-4-pyridone 1b and 2,6-bis(2?-pyridyl)-4-hydroxypyridine 1a was evaluated using infrared spectroscopy, variable temperature 1H and 13C NMR spectroscopy and X-ray crystallography. These studies show that the less polar hydroxy tautomer 1a is the predominant species in the gas phase. The solution-state studies show the more polar keto form 1b to be predominant but not exclusive, and the ratio of tautomers depends on the polarity and hydrogen-bonding ability of the solvent as well as temperature. In the solid-state both species are present in a 1:1 ratio and form a dimeric structure held together by a strong C=O · · · H-O hydrogen bond between the tautomers.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 128143-88-4 is helpful to your research. Computed Properties of C15H11N3O
Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI