Table 2 Thermogravimetric data of L1, L2,L3 and their metal complexes
From: Spectral, thermal, antimicrobial studies for silver(I) complexes of pyrazolone derivatives
Compounds | Decomposition | DTG max (â—¦C) | % Estimated (calculated) | Assignment | |
|---|---|---|---|---|---|
Mass loss | Total mass loss | Lost species | |||
L1 | First step | 190,310,544,800 | 92.36 (92.07) | 92.36 (92.07) | 8C2H2 + CO + NH3 + N2 |
305.19, C19H19ON3 | Residue | Â | 7.64 (7.86) | Â | 2C |
[Ag(L1)2(H2O)2]NO3 | 1st step | 189 | 33.378 (33.062) | 86.526 (86. 86) | 9C2H2 + 2H2O |
816.65, AgC38H42N7O7 | Second step | 366,562, | 52.79 (53.798) |  | 8C2H2 + 4HCN + NO + 2NO2 |
| Â | Residue | 807,931 | 13.474 (13.14) | Â | Ag |
L2 | First step | 273,475,771 | 86.70(86.56) | 86.7(86.56) | 6C2H2 +  + SO + N2 |
268, C15H12N2OS | Residue | Â | 13.30(13.43) | Â | 3C |
[Ag(L2)2(H2O)2]NO3.H2O | First step | 99 | 2.08 (2.37) | 75. 90 (76.404) | H2O |
760.59, AgC30H30N5O8S2 | Second step | 203,528 | 73.82 (74.034) |  | 10C2H2 + 4HCN + 2H2O + NO2 + SO + SO2 |
|  | Residue | 881 | 23.35 (23.596) |  | Ag + 6C |
L3 | First step | 120, 291 | 70.55(71.23) | 99.834 (99.99) | 8C2H2 |
292, C18H16O2N2 | Second step | 518 | 28.604 (28.76) |  | 2CO + N2 |
[Ag(L3)2(H2O)2]NO3 | First step | 244 | 51.071 (50.60) | 82.241 (81.85) | 14C2H2 + 2H2O |
790.57, AgC36H36N5O9 | Second step | 534 | 31.17 (31.25) |  | C2H2 + CO + 2HCN + 3NO2 |
|  | Residue | 677 | 17.76 (18.15) |  | Ag + 3C |