Intramolecular photochemical proton transfer in 3-hydroxyflavone derivatives was written by Ivanova, L. L.;Demyashkevich, A. B.;Oganesyan, E. T.. And the article was included in Khimiya Vysokikh Energii in 1986.Reference of 7528-78-1 This article mentions the following:
Rate constants of the intramol. proton transfer in 3-hydroxyflavone and its 4′-methoxy- and 3′,4′-dimethoxy derivatives were studied at 77° in different solvents. The high activation barrier of the reaction was related to the characteristic geometry (non(linearity) of the intramol. H-bond. This barrier decreased with increase of the deformation polarization of the glassy medium (comprising electronic and at. polarizations). In the experiment, the researchers used many compounds, for example, 3,3′,3”-Nitrilotripropanenitrile (cas: 7528-78-1Reference of 7528-78-1).
3,3′,3”-Nitrilotripropanenitrile (cas: 7528-78-1) belongs to nitriles. Nitriles are polar, as indicated by high dipole moments. As liquids, they have high relative permittivities, often in the 30s. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.Reference of 7528-78-1
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts