Author: eletronicospopular

Conformational equilibria for 2- and 3-chlorostyrene: Raman and FTIR spectra and ab initio calculations. Abstract Ab initio SCF MO calculations at the 3–21G level and the vibrational spectra [Raman and Fourier transform (FT) IR] of liquid-phase 2-chloro- and 3-chlorostyrene are reported. For 2-chlorostyrene, the ab initio calculations predict skew and gauche minima, with an energy…

Vibration wavenumbers of 2-aminobenzotrifluoride in the ground and S1 electronic states from its infrared, Raman and supersonic jet S1-S0 fluorescence spectra. Abstract Raman and infrared spectra of 2-aminobenzotrifluoride, in the liquid phase, and single vibronic level fluorescence (SVLF) spectra, in a supersonic jet, have been recorded and assigned to give an almost complete set of…

Combined Raman and 51V NMR spectroscopic study of Vanadium(V) oligomerization in aqueous alkaline solutions. Abstract The Raman spectra of aqueous vanadium (V) solutions at different pH values, ranging from 13.1 to 7.0, are presented. The dominant bands in the range 700–1100 cm−1 are assigned to the VO symmetrical stretching of the different oligomers, using additional…

CF3 torsional potentials in 2-aminobenzotrifluoride in the S0 and S1 electronic states from fluorescence spectra in a supersonic jet. Abstract Both fluorescence excitation and dispersed fluorescence spectra of 2-aminobenzotrifluoride in a supersonic jet show quite extensive vibrational structure due to the CF3-torsional motion in the S1 and S0 electronic states, respectively. This structure has been…

Raman spectroscopic study of the conformational equilibrium of liquid 3-fluorostyrene. Abstract The Raman spectra of liquid 3-fluorostyrene show pairs of bands whose temperature-dependent intensities clearly suggest the occurrence of a conformational equilibrium. From these bands, assigned to cis and trans conformers, a trans–cis energy difference of 0.70 ± 0.20 kJ mol−1 was obtained for the…