Resonance Raman spectroscopic study of titanium tetraiodide in different organic solvents: Spectroscopic constants and half‐band widths for the ν1 (a1) vibration

Resonance Raman spectra have now been observed from solutions of titanium tetraiodide in five organic solvents. High intensity overtone progressions of the v1 (a1) vibration extend to 9v1–13 v1, and these progressions have permitted the determination of the spectroscopic constants ω1 and x11 for each solution. The latter are compared with values obtained from solid state measurements. Little variation is found in ω1 (161.6–160.9 cm−1) and none in x11 (0.08±0.02 cm−1) with change of solvent or state. The members of the overtone progressions decrease in intensity and increase in half-bandwidth with increase in the vibrational quantum number.