Infrared Spectra of the Methyl Halides. III. Methyl Iodide Near 4400 cm—1

Abstract

At least four overlapping perpendicular bands of CH₃I are observed in the 2.2 μ region. Two are assigned in this work to ν₂+ν₄ at 4302.14, and ν₄+ν₅ at 4438.99 cm^—1. Two others are tentatively assigned to ν₁+ν₅ at 4489.54, and ν₁+ν₃+ν₆ at 4467.04 cm^—1. Several anomalous features are outlined, and empirical expressions are given.