Compound

ν_(C=N)

ν_(O-H)

ν_(C-O)

ν_(C=O)

ν_(C=C)

ν_(C-N)

ν_N-CH3

ν_(CH)as(ar)

ν_(CH)s(ar)

ν_(CH)(CH₃)

L₁

1596 s

3505 w

1362 m

1676 s

1505 m

1324 m

1425 m

3085 w

3075 w

2945 w

L₂

1605 s

3499 w

1230 m

-

1500 m

1330 m

-

3092 w

3005 w

-

L₃

1633 s

3432 w

1274 m

-

1498 m

1315 m

-

3095 w

3080 w

-