Table 2.
Major infrared bands (cm−1) for 3amt and its Cd(II) and Sn(II) adducts.
| 3amt | CdCl2-(3amt) | CdCl2-2(3amt) | SnCl2-(3amt) | SnCl2-2(3amt) | Assignments |
|---|---|---|---|---|---|
| 3398 s | 3419 ms | 3340 ms | 3312 w | 3349 vw | v as (N-H); NH2 |
| 3326 mw | 3356 w | 3310 vw | |||
| 3316 mw | 3258 vw | ||||
|
| |||||
| 3182 mw | 3213 w | 3212 ms | 3155 mw | 3155 ms | v s (N-H); NH2 |
| 3131 w | 3153 vw | ||||
|
| |||||
| 1647 vs | 1652 vs | 1645 w, sh | 1688 vs | 1677 vs | δ b(NH2) |
| 1590 s | 1573 w | 1594 vs | 1569 ms | 1566 ms | ν (C=N) |
| 1533 s | 1537 s | 1560 vs | ν (N=N) | ||
| 1480 w | 1479 vs | ||||
|
| |||||
| 1418 s | 1429 ms | 1374 vs | 1405 mw | 1415 w | Ring breathing bands |
| 1389 ms | 1373 w | 1339 ms | 1326 s | ||
| 1332 ms | |||||
|
| |||||
| 1275 vs | 1283 s | 1248 vs | 1257 ms | 1263 w | ρ r (NH2) |
| 1217 vs | 1250 vw | 1213 ms | 1125 vw | 1125 ms | ν (C-N) |
| 1219 vs | 1144 vs | ||||
| 1144 w | |||||
|
| |||||
| 1045 vs | 1088 w | 1083 vs | 1048 s | 1066 s | ρ w (NH2) |
| 945 vs | 1057 s | 1011 vs | 951 vs | 950 vs | |
| 991 s | |||||
|
| |||||
| 873 vs | 901 s | 884 s | 860 ms | 867 s | ρ t (NH2) |
| 830 s | 740 ms | 747 sh | 748 w, sh | 773 ms | |
| 729 vs | 693 vw | 726 ms | |||
| 644 vs | 694 vs | ||||
| 642 ms | |||||
s = strong; w = weak; m = medium; sh = shoulder; v = very; br = broad; ν = stretching; δ = bending.