Table 2 Some IR bands of H2L and the isolated metal complexes
Bands | H2L | Cu(II) | Co(II) | Ni(II) | Zn(II) |
|---|---|---|---|---|---|
ν(OH)solv | 3248* | 3449 | 3452 | 3448 | 3436 |
ν(NH) | 3142 | – | – | – | – |
ν(CH)Ar | 3072 | 3066 | 3062 | 3084 | 3063 |
ν(C=O) | 1635 | – | – | – | – |
ν(C=N) | 1610* | 1620 | 1622 | 1628 | 1625 |
ν(C=C) | 1588 | 1599 | 1592 | 1592 | 1589 |
Amide II | 1537 | 1517 | 1519 | 1521 | 1520 |
νas(C–O–C)furan | 1237 | 1241 | 1257 | 1243 | 1242 |
ν(N–N) | 1158 | 1147 | 1149 | 1151 | 1150 |
ν(C–O) | 1066 | 1092 | 1090 | 1091 | 1085 |
νs(C–O–C)furan | 1017 | 1021 | 1035 | 1020 | 1019 |
ω(OH) | 746 | 756 | 755 | 755 | 753 |
ν(M–O) | – | 592 | 589, 532 | 565 | 588 |
ν(M–N) | – | 475 | 484 | 488 | 445 |