Complex

Type

Tm

(˚K)

E_a

kJ·mol⁻¹

n

a_m

DS^#

kJ·K⁻¹·mol⁻¹

DH^#

kJ·mol⁻¹

Z

S⁻¹

Temp. (˚C)

TGA

Wt. Loss %

Assignment

Calc.

Found

Orotic acid

Endo

429.40

11.31

1.27

1.47

−0.13

−55.88

7.74

67˚C - 232.3˚C

10.34

10.07

Dehydration of water molecule

Endo

636.10

168.53

0.80

2.38

−0.11

−70.78

50.46

232.3˚C - 360˚C

25.27

26.38

Elimination of CO₂

Exo

774.10

72.50

0.97

2.10

−0.12

−90.18

22.13

360˚C - 580.2˚C

57.43

56.49

Elimination of the rest of ligand and formation of carbon residue

[Fe₂(H₂L)₂Cl₂(OH)₂(H₂O)₂]2H₂O

Endo

359.30

25.86

2.67

1.47

−0.12

−43.36

28.84

56.4˚C - 264.1˚C

19.69

19.92

Elimination of 5H₂O and CO

Exo

641.90

128.80

1.45

1.88

−0.11

−69.98

65.55

264.1˚C - 468.7˚C

53.57

53.32

Elimination of 4HCN, 2HCl, 5CO and formation of Fe₂O₃

[Co(H₂L)₂(H₃L)] 3H₂O

Endo

369.5

26.04

1.85

1.63

−0.12

−44.91

25.30

60.1˚C - 240.9˚C

4.66

4.80

Dehydration of 1.5H₂O

Endo

555.4

117.86

1.32

1.95

−0.11

−61.16

66.43

240.9˚C - 335.9˚C

12.26

12.30

Elimination of 1.5H₂O and CO₂

Exo

745.8

275.01

0.88

2.31

−0.11

−79.07

80.97

335.9˚C - 524.8˚C

55.60

55.40

Elimination of 2NH₃, 2CO₂, 2NO, CO, C₄N₂H₄O₂ and formation of CoO+7C

[Ni₂(H₂L)₂(SO₄)] 5H₂O

Endo

379.4

31.30

0.83

2.20

−0.12

−47.41

16.30

55.3˚C - 139.2˚C

17.42

17.32

Loss of 5H₂O and NH₃

Endo

457.2

93.95

1.50

1.86

−0.11

−50.91

69.63

139.2˚C - 258.3˚C

27.19

26.92

Elimination of 2NO, HCN and SO₃

Exo

653

27.73

1.17

1.75

−0.12

−80.40

11.82

258.3˚C - 470.2˚C

10.75

10.86

Elimination of 2O₂ and H₂

Exo

787.9

402.96

1.41

1.94

−0.10

−78.25

171.60

470.2˚C - 593.5˚C

2.60

2.60

Elimination of 0.5O₂ and formation of 2NiO+9C