Tetrahydrofuran vibrational assignments

Scott, D.W. (1970) Tetrahydrofuran Vibrational assignment, chemical thermodynamic properties, and vapor pressure. J. Chem. Thermodyn. 2, 833-837. 

Theoretical determination of force fields may frequently be of assistance. The calculated frequencies are, however, dependent on the level of theory employed. Calculated ab initio harmonic frequencies for furan are sufficiently accurate to help in the assignment of experimental frequencies <88JPC1739> as well as the vibrational overtones <91JPC7659>. In a reinvestigation of the vibrational spectrum of tetrahydrofuran all the normal modes have been identified and assigned in terms of symmetry coordinates with the guidance of the computed ab initio spectrum <93JPC7844>. 

In 1965 Edgell and co-workers reported an infrared band, from solutions of alkali metal salts of Co CO) dissolved in tetrahydrofuran (THF), which was assigned to the cation vibrating in a solvent cage. Subsequently a detailed report about the nature of the vibration of these monatomic ions in several non-aqueous solvents was given. The bands are broad and of medium intensity. Thus their properties are... 

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