Synthesis, Spectral Characterization, and Biological Activities of Some Metal Complexes Bearing an Unsymmetrical Salen-Type Ligand, (Z)-1-(((2-((E)-(2-Hydroxy-6-methoxybenzylidene)amino)phenyl)amino) methylene) Naphthalen-2(1H)-one
Table 3
TGA data of the ligand and its metal complexes.
Compound
Temperature range (°C)
Weight loss (%)
Assignments
Found
Calc.
H2L
150–320 320–870 >870
16.3 76.8 6.9
16.4 77.5 6.1
Loss of methoxy and hydroxyl groups Loss of all most organic residue 2C atoms
[Zn(L).H2O]
150–250 250–375 375–870 >870
3.8 6.5 67.8 21.9
3.8 6.5 67.7 22.0
Loss of a coordinated H2O Loss of methoxy group Loss of 2C4H4 groups and C14H7N2O ZnO and 2C atom
[Cu(L)]
45–150 150–410 410–870 >870
∼ 17.7 57.9 24.4
∼ 18.1 59.2 22.7
Loss of uncoordinated H2O Loss of methoxy and C4H4 groups Loss of C4H4 group and C14H7N2O CuO and 2C atom
[Co(L)]
40–150 150–440 440–850 >850
∼ 18.8 64.4 16.8
∼ 18.3 65.1 16.6
Loss of uncoordinated H2O Loss of methoxy and C4H4 groups Loss of C4H4 group and C16H7N2O CoO
[Mn(L)]
40–150 150–500 500–865 >865
∼ 34.0 50.0 16.0
∼ 30.1 54.1 15.8
Loss of uncoordinated H2O Loss of methoxy and 2C4H4 groups Loss of the remain organic C16H7N2O MnO
[Fe(L)Cl]
40–150 150–375 375–630 630–870 >870
∼ 7.7 29.0 40.8 22.5
∼ 7.5 27.7 43.4 21.4
Loss of uncoordinated H2O loss of HCl gas Loss of methoxy and 2C4H4 groups Loss of the remaining organic C14H7N2O0.5 1/2 Fe2O3 and 2C atom
