Table 7 Decomposition steps of the complexes based on the thermogravimetric data
Complex | DTG maximum temp. (°C) | Removing species | Weight loss % Found (Calcd) |
|---|---|---|---|
[Co(OBH)2Cl]Cl·½EtOH | 60 | - ½Cl2 + ½EtOH | 6.36 (8.84) |
319 | - C16H24N4O6Cl | 60.45 (61.05) | |
500 | - C4H4N2 | 11.77 (12.11) | |
>500 | [CoO4N2] (residue) | 21.58 (22.82) | |
[Zr(OBH)Cl4]·2H2O | 76 | - (Cl2 + H2O) | 16.12 (16.99) |
313 | - (H2O + C8H12N2O2) | 37.67 (35.58) | |
449 | - Cl2 | 12.44 (13.55) | |
>500 | C2N2O2Zr (residue) | 30.15 (33.67) | |
[VO(OBH-H)2]·H2O | 59 | - H2O | 3.65 (3.04) |
289 | - C16H24N4O6 | 61.57 (62.24) | |
405–590 | - C4H4N4O2 | 25.56 (23.67) | |
>600 | V (residue) | 7.45 (8.53) | |
[Cu(OBH)2Cl2]·2H2O | 59 | - 2H2O | 4.29 (5.31) |
291 | - C16H24N4O6 | 54.90 (54.26) | |
374 | - C4H4N4O3 | 25.56 (26.37) | |
>400 | CuO (residue) | 12.30 (11.71) | |
[Ni2(OBH)Cl4]·H2O·EtOH | 72 | - (EtOH + H2O) | 13.51 (11.08) |
368 | - (Cl2 + C8H12N2O2) | 40.20 (41.40) | |
470 | - Cl2 | 11.20 (12.27) | |
550 | - C2H2N2 | 8.00 (9.35) | |
>600 | 2 NiO (residue) | 27.09 (25.87) | |
[Pd2(OBH)(H2O)2Cl4]·2H2O | 75 | - 2H2O | 6.47 (5.83) |
322 | - 2H2O + 2Cl2 + C4H12 | 38.49 (38.48) |