Table 3.
Information from thermal studies about the Cu(II) chelates (1–3).
| Compounds | Step | Temperature ranges (°C) | Loss of mass Found (Calc.) % | Assignments |
|---|---|---|---|---|
| (1) | first | 180–281 | 17.51 (17.54) | Loss of 2H2O(coord.) + CH3COO |
| second | 283–470 | 58.75 (58.92) | Loss of C18H19N6 | |
| Residue | 470–700 | 23.74 (23.54) | Residue: CuO + 4C atoms | |
| (2) | first | 70–150 | 5.85 (5.86) | Loss of 2H2O(solv.) |
| second | 150–352 | 25.22 (25.22) | Loss of 2H2O(coord.) + C2H3N2+SO2 | |
| third | 352–700 | 48.62 (48.18) | Loss of C16H16N4O2 | |
| Residue | 700–800 | 20.31 (20.74) | Residue: CuO + 4C atoms | |
| (3) | first | 178–305.5 | 33.01 (33.02) | Loss of 2H2O(coord.) + C7H9N3 |
| second | 305.5–578 | 42.37 (42.38) | Loss of C11H10ClN3 | |
| Residue | 578–700 | 24.61 (24.60) | Residue: CuO + 4C atoms |