Table 1 Infrared frequencies (cm−1)a and tentative assignmentsb for (A) L1, (B) [Ag(L1)2(H2O)2]NO3, (C), L2 (D) [Ag(L2)2(H2O)2]NO3.H2O, (E) L3 and (F) [Ag(L3)2(H2O)2]NO3
From: Spectral, thermal, antimicrobial studies for silver(I) complexes of pyrazolone derivatives
| A | B | C | D | E | F | Assignments |
|---|---|---|---|---|---|---|
| - | 3379m,br | – | 3364m,br | – | 3364m,br | ν(O–H); coordinate H2O |
| 3100w | 3100w | 3066w | 3100w | 3099 | 3100 | ν(C-H); aromatic |
| 2900 | 2900 | 2890 | 2885 | 2901 | 2900 | ν(C-H); aliphatic |
| 1670ms | 1666m | 1681s | 1685s,sh | 1678m | 1678m | ν(C = O) |
|
1550s 1400m |
1523m 1410s | 1496m 1408m |
1527m 1381 |
1508s 1427vw |
1520s 1415 |
ν(C = N) ν(C = C) |
|
1319s – |
1319s 1188s |
1300s - |
1311w 1165m |
1311sh - |
1311m 1172s |
δb(-CH2), ν(NO3−1) |
|
1122s 1018w – |
1122s 1018w – |
1130m – 1056w |
1104vw – 1099sh |
1110w – – |
1130m – – |
ν(C–C), ν(C-N) ν(C = S) |
|
954w 943vw |
995w 995m |
991s 921w |
941vw 910vw |
988w 938 s |
985w 965sh | −CH-bend; phenyl |
| – | 813m | – | 792 m | – | 779m | ν(Ag ←OH2) |
| – | 577w | – | 515w | – | 544w | ν(Ag–O) |
| – | 524w | – | 498w | – | 488w | ν(Ag–N) |
