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
--
Table 2:
Thermodynamics functions and stepwise formation constants of 1:1 and 1:2 metal complexes at 30, 40, and 50°C in 75% ethanol-water.
