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. 2023 Apr 29;6:84. doi: 10.1038/s42004-023-00875-9

Table 2.

Raman vibrational mode peaks attribution regarding spectra in Fig. 4⁸².

[CO₂CH₃]⁻		[BMIM]⁺		ACN
ν (cm⁻¹)	mode	ν (cm⁻¹)	mode	ν (cm⁻¹)	mode
635	δ_OCO + ν_CC	388	δ_C-Et-N	380	δ_C-C≡N
899	δ_OCO + ν_CC	440	δ_{NC_Im}	750	Octave
1334	ν_CO	597	ν_{Et-N +} ν_Me-N	920	ν_C-C
1567	Anti ν_CO	701	ν_{Et-N +} ν_Me-N	1370	CH₃ deform.
		830	ν_{C-C-C but}	2200	ν_C≡N
		957	ν_{C_Et}
		1019	ring deform.
		1089	δ_{H_Et}
		1118	δ_{H_Et}
		1245	ν_{C-C skel}
		1295	Twist–(CH₂)n
		1381	δ_{H_Et +} ν_{C_Im-N}
		1417	δ_{H_Me}
		1451	δ_{H_Et}
		1600	ν_{C=C ar}