Complexa Temp. range (ยบC) Found mass loss (calc.) % Assignment
(1) 45-189 7.24 (8.13) Loss of two water molecules in outside of the coordination sphere.
189-331 16.67 (17.39) Loss of one coordinated water molecule and one coordinated acetate group.
331-506 24.43 (24.17) Further decomposition of a part of the ligand (C7H7O).
506-709 14.38 (14.46) Evolution of SO2 gas leaving CuO residue with contaminated carbon atoms.
(2) 45-178 7.91 (8.73) Loss of two water molecules in outside of the coordination sphere.
178-273 18.61 (18.66) Loss of one coordinated water molecule and one coordinated acetate group.
273-514 18.06 (18.42) Further decomposition of a part of the ligand (C6H4).
514-560 6.64 (6.79) Evolution of N2 gas.
560-640 15.43 (15.51) Evolution of SO2 gas leaving CuO residue with contaminated carbon atoms.
(3) 45-189 4.15 (7.87) Loss of two water molecules in outside of the coordination sphere.
189-288 16.72 (16.83) Loss of one coordinated water molecule and one coordinated acetate group.
288-400 10.46 (10.05) Evolution of NO2 gas.
400-592 13.72 (13.98) Evolution of SO2 gas.
  592-670 22.44 (22.73) Decomposition of a part of the ligand (C6H4N2) leaving CuO residue with contaminated carbon atoms.
(4) 40-189 5.22 (8.44) Loss of two water molecules in outside of the coordination sphere.
189-316 18.00 (18.05) Loss of one coordinated water molecule and one coordinated acetate group.
316-533 20.47 (21.33) Further decomposition of a part of the ligand (C7H7).
533-670 15.45 (15.00) Evolution of SO2 gas and CuO residue with contaminated carbon atoms.
aNumbers as given in Table 2
Table 4: Thermal analyses data of the Cu(II) complexes.