vibration cm⁻¹

type of vibration

3600 - 3400

ν (OH)

(OH)—valence vibration—main layer

ν₁, ν₃ (H₂O)

(H-O-H)—valence vibration—interlayer water

2943

ν_as (CH₂)

asym. (C-H)—valence vibration of CH₂-group

1630

ν₂ (H₂O)

(H-O-H)—valence vibration—inter layer water

1417

δ_s (CH₂)

sym. (C-H)—deformation vibration of CH₂-group

1373

δ_s (CH₃)

sym. (C-H)—deformation vibration of CH₃-group

1292

ν_as ( ${\text{SO}}_3^{2-}$ )

asym. ( ${\text{SO}}_3^{2-}$ )—valence vibration