Theoretical and Experimental Studies of 1-Butyl-3-methylimidazolium Methanesulfonate Ionic Liquid

Table 1

FTIR of [C₄mim][CH₃SO₃] with its molecular vibrations at a different wavelength.

Type of molecular vibrations	Wave number (cm^-1)
Imidazole ring ν(C–H)	3097.31
Aliphatic ν(C–H)	2960.51
Imidazole ν(ring stretching)	1570.28
Imidazole H–C–C & H–C–N bending, SO3 symmetric stretch	1186.14
SO3 symmetric stretch	1049.35
In-plane imidazole ring bending	850.52
Out-of-plane C–H bending of imidazole ring, C-S stretch, SO3 symmetric bend	754.28
Imidazole C2–N1–C5 bending	624.64