Wavenumber (cm−1) | Assignment | ||
---|---|---|---|
ChCl:EG | B:EG | B:U | |
– | 1495 | 1491 | νasH–C–H (CH3) in betaine |
1479 | 1475 | 1472 | δsC-H(31), δs CH2, δsCH3, δsCOH(48) and ρCH3(49) in choline chloride; νsCOO−(47) and δaCH3 in betaine; νCN in urea |
955 | 953 weak | 955 weak | νaNC4, νC-C and νaCCO)in choline chloride; δC–C–N and v(CC)in betaine |
– | 933 | 933 | δ C–N–C) and ρ(CH2) in betaine |
883 medium | 893 | 895 weak | ρC-H and ρCH2 in EG; νC–C and νs(CCN)) in betaine |