Thes‐trans,s‐cis‐conformer of all‐trans‐1,6‐diphenyl‐1,3,5‐hexatriene was detected: A response

Abstract

In a series of publications, starting in 1992, we presented detailed analyses of changes in the fluorescence and absorption spectra of all-trans-1,6-diphenyl-1,3,5-hexatriene, ttt-DPH, that allowed their resolution into the pure spectra of two contributing species. Consistent with theory, we assigned the absorption and fluorescence of the major and minor species to the s-trans,s-trans-and s-cis,s-trans-conformers of ttt-DPH, respectively. Catal an criticized our use of isopolarizability conditions to achieve improved analyses, and we responded.He has now repeated his criticism in "Catal an, J. On the temperaturedependent isomerization of all-trans-1,6-diphenyl-1,3,5-hexatriene in solution:A reappraisal. J. Phys. Org. Chem. 2022, ASAP," revealing persisting misconceptions. Not wishing to leave the casual reader with the impression that there are valid reasons for considering our work invalid or, at best, controversial, we respond again.