Table 2.
ν/cm−1 | ||||||
---|---|---|---|---|---|---|
compound | ν(C=O) | ν(O–H) | ν(C=N) | ν(M–N) | ν(M–O) | ν(–N–SO2) |
L1 | 1768 and 1725 | 3384 | 1618 | — | — | — |
1 | 1676 | — | — | 512 | 384 | — |
2 | 1650 and 1725 | — | 1617 | 516 | 417 | — |
L2 | — | 3423 | 1652 | — | — | 941 |
3 | — | — | — | 480 and 461 | 403 | 891 |
4 | — | 3423 | 1658 | 415 | — | 941 |