Vibrational spectra, crystal structure, DFT quantum chemical calculations and conformation of the hydrazo – bond in 6-methyl-3-nitro-2-(2-phenylhydrazinyl)pyridine

Excited states of selected hydrazo-compounds on the example of 5-nitro-2-(2-phenylhydrazinyl)pyridine and its 3-, 4- or 6-methyl isomers

“…The electronic absorption and luminescence spectra of four phenylhydrazo-pyridine derivatives were measured and analysed in terms of DFT quantum chemical calculations. The vibrational properties of hydrazo-bridge bond in these compounds were reported in our previous papers [8,9]. Here the influence of the hydrazo-bond and a solvent on the electronic absorption properties of these compounds has been studied.…”

Growth, structure, spectral and optical properties of semiorganic crystal: Pyridine-1-ium-2-carboxylatehydrogenbromide

“…This deviation is used to induce the polarizabilities of the molecule. The incorporation of substitution in pyridine ring will induce an external electric field in the ring system which causes stretching and contraction of the C=C and C-C bond lengths respectively, which, in turn, alters both the C=C stretching vibrational mode and the vibrational modes [26].…”