Vibrational Spectra of Fluorinated Aromatics. X. <i>p</i>-Fluorochloro-, <i>p</i>-Fluorobromo-, and <i>p</i>-Fluoroiodobenzene

Abstract

The infrared absorption spectra of liquid p-fluorochloro-, p-fluorobromo-, and p-fluoroiodobenzene, and the stronger bands of the first two compounds in the gaseous state, have been obtained in the region 2—38μ with NaCl and CsBr prisms. The Raman spectra of the compounds in the liquid state have been photographed with a 3-prism glass spectrograph of linear dispersion 15 A/mm at 4358 A, and depolarization ratios have been measured for the stronger Raman bands of p-fluorochloro- and p-fluorobromobenzene. Complete assignments of the fundamental vibrational frequencies have been made, and the spectra are interpreted in detail.