Table 3 Results of thermogravimetric analysis (TGA) of metal complexes of the ligand, DBABP.

From: New Schiff base ligand and its novel Cr(III), Mn(II), Co(II), Ni(II), Cu(II), Zn(II) complexes: spectral investigation, biological applications, and semiconducting properties

Complex no

Molecular formula (M.wt)

Temperature range (°C)

Wt loss %Found % (calcd %)

Decomposed product lost

1

[Cr(DBABP)(H2O)2Cl2]

(601.90)

22–214

215–321

322–659

660–887

5.40 (5.98)

19.31 (19.44)

32.54 (32.07)

24.58 (23.92)

18.17 (18.59)

2 coordinated H2O

2 HCl + CO2

CH4 + 2 C2H2 + CO2 + 3 HCN

0.5 HCHO + 0.5 CH4 + 3 HCN + C3H4

0.5 Cr2O3 + 3 C

2

[Mn(DBABP)(EtOH)3Cl]

(671.40)

42–162

163–297

298–884

6.80 (6.85)

19.13 (19.14)

53.50 (52.73)

20.57 (21.28)

1 coordinated EtOH

2 coordinated EtOH + HCl

6 HCN + 4 CH4 + CO2 + 3 CO

MnO + 6 C

3

[Co(DBABP)(EtOH)2(H2O)Cl].H2O

(665.40)

37–137

138–320

321–360

361–487

488–899

5.93 (5.41)

13.30 (13.83)

5.47 (5.49)

19.75 (19.83)

18.61 (18.94)

36.94 (36.50)

1 lattice H2O + 1 coordinated H2O

2 coordinated EtOH

HCl

2 CO2 + CO + CH4

C2H6 + 3 N2H4

CoO + 14 C

4

[Ni(DBABP)(EtOH)3Cl].EtOH

(721.10)

24–285

286–544

545–880

25.19 (25.52)

24.64 (24.06)

30.57 (30.09)

19.60 (20.33)

1 lattice EtOH + 3 coordinated EtOH

HCl + 3 HCN + 2 CO

3 HCN + CO2 + CO + 4 CH4

NiO + 6 C

5

[Cu(DBABP)(H2O)3Cl]

(596.00)

39–249

250–343

344–527

528–724

725–902

9.83 (9.06)

13.56 (13.51)

24.74 (24.50)

15.51 (16.28)

12.55 (13.25)

23.89 (23.40)

3 coordinated H2O

CO2 + HCl

CH4 + CO2 + N2H4 + 2 HCN

CO + HCN + C2H2 + CH4

2 C2H2 + HCN

CuO + 5 C

6

[Zn(DBABP)(EtOH)Cl]

(589.80)

38–243

244–307

308–445

446–900

7.90 (7.80)

11.04 (10.94)

24.28 (24.08)

43.36 (43.40)

13.42 (13.78)

1 coordinated EtOH

HCl + CO

2 HCN + 2 CO2

C2H4 + CH4 + 4 HCN + 4 C2H2

ZnO

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