Complex
(HL) |
t°C |
K. cal. mol-1 |
K. cal. mol-1 |
| 30 |
40 |
50 |
- ΔG°30 |
-ΔH°30 |
-ΔS°30 |
| logk1 |
logk2 |
logk1 |
logk2 |
logk1 |
logk2 |
- ΔG°1 |
- ΔG°2 |
- ΔH°1 |
- ΔH°2 |
ΔS°1 |
ΔS°2 |
| Co(II) |
10.09 |
10.56 |
9.79 |
10.4 |
9.55 |
10.2 |
13.9903 |
14.6419 |
0.120863 |
0.0803863 |
0.0457736 |
0.0480579 |
| Cd(II) |
9.88 |
10.99 |
9.69 |
10.6 |
9.52 |
10.1 |
13.6991 |
15.2381 |
0.080528 |
0.198704 |
0.0449457 |
0.0496351 |
| Ni(II) |
10.18 |
10.57 |
9.8 |
10.32 |
9.55 |
10.11 |
14.115 |
14.6558 |
0.141149 |
0.10293 |
0.0461185 |
0.0480296 |
| Zn(II) |
9.21 |
9.69 |
8.93 |
9.31 |
8.61 |
9 |
12.7701 |
13.4356 |
0.134038 |
0.15442 |
0.0417032 |
0.0438324 |
| Fe(III) |
7.41 |
8.4 |
6.9 |
8.1 |
6.5 |
7.9 |
10.2743 |
11.647 |
0.203699 |
0.112015 |
0.0332363 |
0.0380692 |
| Mn(II) |
9.91 |
10.61 |
7.96 |
10.47 |
6.7 |
10.3 |
13.7407 |
14.7113 |
0.719272 |
0.0692309 |
0.0429749 |
0.0483235 |
| pka |
10.751 |
|
10.544 |
|
10.371 |
|
14.9068 |
|
0.0850294 |
|
0.0489166 |
|
|
| Type of complex |
ΔGoΔS° |
ΔH° and ΔS° |
| inner sphere complex |
Large negative |
Large positive |
| outer sphere complex |
Small negative |
Small positive |
|
| Table 1: Thermodynamics functions and stepwise formation constants of 1:1 and 1:2 metal complexes at 30, 40, and 50°C in 75% ethanol-water. |
