Table 3 Thermal decomposition steps, mass loss (%), proposed lost segments, final residue thermo-kinetic activation parameters of each decomposition step for the prepared complexes in an N2 atmosphere, at a heating rate of 5 °C / min.
Complexes | Temperature oC | Fragment loss % | Weight loss % | E* [KJmol-1] | A [S-1] | ∆H* [Jmol-1] | ∆G* [KJmol-1] | ∆S* [Jmol-1K-1] | ||
|---|---|---|---|---|---|---|---|---|---|---|
Lost form | M. Wt | Found | Calc | |||||||
CuL | 44–429 °C | H2O coord + CH3 + Cl | 68.5 | 13.47 | 13.42 | 8.2 | 17.2 | 4223.8 | 23,300.9 | -4163 |
430–803 °C | C19H14N2O3 | 318 | 62.78 | 62.91 | 5250.26 | 26,527.3 | -51.75 | |||
804–999 °C | 1/2C + 4H2 | 14 | 2.75 | 2.77 | 7404.67 | 40,349.5 | -52.1 | |||
\(>999 ^\circ \text{C}\) | Cu + 1/2C | 69.5 | 13.93 | 13.75 | 7416.67 | 41,349.5 | -53.1 | |||
NiL | 46–268 °C | 2H2O hyd + H2O coord. + NO3 + 3H2 | 122 | 23.19 | 23.11 | 2.3 | 3.1 | 3621 | 19,421 | -53.94 |
269–593 °C | C19H8O2N2 | 296 | 56.05 | 56.06 | 4832 | 25,231 | -50.196 | |||
594–995 °C | C2H11O | 51 | 9.42 | 9.66 | 8721 | 46,021 | -51.8675 | |||
\(>995 ^\circ \text{C}\) | Ni | 58.69 | 11.34 | 11.12 | 1100 | 5782 | -55.25 | |||
ZnL | 44–360 °C | 3H2O coord + NO3 + C6H12O | 216 | 40.31 | 40.38 | 6.2 | 8.3 | 4301 | 24,002 | -55.93 |
6203 | 5531 | -54.18 | ||||||||
360–718 °C | C11N2O2 | 192 | 36.16 | 35.9 | 2438 | 12,321 | -54 | |||
719–999 °C | C4H13 | 61 | 11.91 | 11.4 | 6236 | 44,521 | -54 | |||
\(>999\) °C | Zn | 65.4 | 11.63 | 12.2 | 6660 | 45,521 | -54.21 | |||
VOL | 45–215 °C | H2O coord + C2H5 + 3H2 | 53 | 11 | 10.96 | 8.2 | 17.2 | 4423.8 | 23,326.9 | -5163 |
215–515 °C | C9H7N2O | 159 | 32.84 | 32.89 | 5250.26 | 26,527.3 | -51.75 | |||
516–708 °C | C8H5O2 | 133 | 27.85 | 27.5 | 7404.67 | 40,349.5 | -52.1 | |||
709–978 °C | C4H7O | 71 | 15.38 | 14.8 | 7416.67 | 41,349.5 | -53.1 | |||
\(>978 ^\circ \text{C}\) | VO | 66.9 | 12.93 | 13.8 | 3621 | 19,421 | -53.94 | |||