Infrared Spectra of CH3COONa and CD3COONa and Assignments of Vibrational Frequencies

Abstract

The absorption spectra of solid CH₃COONa and CD₃COONa have been observed from 350—5000 cm^‐1. All of the fundamental frequencies of the acetate ion have been observed and assigned with the exception of that of the torsional oscillation. The assignments for CH₃NO₂ and CD₃NO₂^2,3 were used as an aid in assigning the CH₃CO₂^‐ and CD₃CO₂^‐ frequencies. An approximate force constant, 9.3×10⁵ dynes/cm, is given for the C–O bond of CH₃CO₂^‐ in solid sodium acetate. The spectra of the partially deuterated species were observed and assignments were made with the aid of the Decius‐Wilson sum rule and the Teller‐Redlich product rule.