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Table 3 Thermal behavior of the copper(II)- phenolic complexes.

From: The ligational behavior of a phenolic quinolyl hydrazone towards copper(II)- ions

No.

Complex (F.W.)

Temperature

range (°C)

% Wt. loss

Found/(Calcd.)

Lost molecules;

Assignment

Probable residue

Found/(Calcd.)

1

[Cu(HL)(H2O)2]2(ClO4)2.1/2H2O.¼MeOH

(1027.76)

43-241

94.13

* Decomp. in one step;

ΔΗ = 830.21 J/g

Metallic Cu;

5.87 (6.17)

2

[Cu2(HL)2(H2L)(NO3)2].1¼H2O.2¾MeOH

(1281.78)

46-105

2.23 (2.22)

* ¾ MeOH + ¼ H2O

 
  

106-272

17.07 (16.23)

* 2 MeOH + H2O + 2HNO3

(CuO)2;

13.27 (12.41)

  

272-430

51.68

* Decomp.

 
  

430-587

15.75

  
  

32-292

9.54 (11.3)

* 31/8 H2O with decomp.

 

3

[Cu (H2Lc) (H2O)2 Cl2]. 11/8 H2O

(498.1)

293-797

42.06

 

(Cu2O + CuO);

48.4 (44.7)

  

44-254

12.69 31.00

* Two overlapped steps;

 

4

[Cu(H2L)(H2O)Br2].1/2H2O

(557.72)

254-434

18.28 (33.8)

* 11/2 H2O + 2HBr

(Cu2O + Cu);

34.0 (37.0)

  

434-800

35.00

→ Decomp.

 
  

29-268

13.16 (13.48)

* 2 AcOH

 

5

[Cu(HL)(OAc)]2. MeOH

(889.91)

269-676

66.94

* MeOH with decomp.

(Cu2O + Cu);

19.9 (23.2)

  

28-145

18.39 (7.45)

* 2¼ H2O

 

6

[Cu(H2L)(H2O)2 SO4].2¼H2O

(543.52)

146-409

19.01(18.03)

* H2SO4

(Cu2O + CuO);

40.20 (40.90)

  

409-797

32.42

* 2 H2O with decomp.