Table 5: Thermogravimetric data of (HL) ligand and its Co(II), Ni(II), Cu(II), Zn(II), and Pd(II) complexes.
| Complex | Decomp. step (°C) | Mass loss (%) Found (Calcd.) |
MW loss | Species eliminated | Solid residue (%) Found (Calcd.) |
|
| Found | Calcd. | |||||
| [Co(L)2(H2O)2] | 125–350 | 5.30 (5.25) | 36 | 35.7 | 2H2O | (CoO + 4C) |
| 350–450 | 22.66 (22.64) | 154 | 153.84 | C10H4NO | 18.09 (18.26) | |
| 450–647 | 10.89 (10.99) | 74 | 74.68 | C3H8NO | ||
| 647–1,000 | 42.97 (42.86) | 292 | 291.23 | C15H8N4O3 | ||
| [Ni(L)2(H2O)2] | 130–300 | 5.30 (5.281) | 36 | 35.87 | 2H2O | (NiO + 2C) |
| 300–426 | 24.14 (24.219) | 164 | 164.52 | C9H10NO2 | 14.528 (14.50) | |
| 426–609 | 17.37 (17.50) | 118 | 118.88 | C6H2N2O | ||
| 609–1,000 | 38.57 (38.50) | 262 | 261.53 | C15H8N3O2 | ||
| [Cu(L)(H2O)]CH3COO | 216–477 | 38.87 (38.47) | — | 166.14 | C7H6N2O3 | (CuO + 5C) |
| 477–1,000 | 29.95 (29.41) | 166.51 | 127.31 | C6H9NO2 | 32.23 (32.12) | |
| [Zn(L)(H2O)]CH3COO | 120–300 | 14.72 (14.68) | 64 | 63.55 | H2O + CH4NO | (ZnO + 2C) |
| 300–400 | 4.37 (4.382) | 19 | 19.05 | H3O | 24.243 (24.21) | |
| 400–1,000 | 56.59 (56.79) | 246 | 246.6 | C15H6N2O2 | ||
| [Pd(HL)Cl2] | 50–309 | 15.09 (15.159) | 71 | 71.34 | Cl2 | (PdO2 + C) |
| 309–454 | 28.69 (28.743) | 135 | 135.265 | C7H9N3 | 31.96 (31.514) | |
| 454–1,000 | 24.22 (24.584) | 114 | 115.69 | C8H2O | ||