β Scribed by P.V. Huong; A. Graja
No coin nor oath required. For personal study only.
AlI the intermolecular viirations of an isolated hydrogen bond are observed for the first time, with the phenolmathylpyridinoxide complex in dilute solution in quasi-inert solvents. The spectral characteristics obtained are ana-IysPd by comparison with thos: of the intramoIecu?ar vibrations of the c~emi~igroups dire&y involved in the hp drogen bond, C-0-H...O-?I. The latter is found to be relatively strong and proiokes'a reduction by 2OF of the stretching frequency ~f0Hf and an increase by 200% of the out-of-plane deformation'T(OH) and by 2% of the inplane bending 6(OH). It provokesalso the appearance of the intermolecular stretching of001 at 194 cm'*_ the intermoiecutar out-f-plane twisting ~(00) at 324 ~-II-~, and two in-plane 00 bending modes at 78 and 135 cm-*.
π SIMILAR VOLUMES
Steady-state (366 nm) and nanosecond laser (347.2 nm) photolyses of the title compound in benzene, ethanol and EPA at room temperature and 77 K reveal that both the lowest excited singlet and triplet states cause the intramolecular hydrogen-atom abstraction yielding the excited singlet and triplet b