Metal Chelates of Sulfafurazole Azo Dye Derivative: Synthesis, Structure Affirmation, Antimicrobial, Antitumor, DNA Binding, and Molecular Docking Simulation

Table 3

Thermal decomposition results of metal chelates.

No. empirical formula (mol. Wt.)	Temp. range (°C)	Mass loss (%)		Assignment
		Calc.	Found
H2PIBS-Cu [Cu(H2PIBS)2(H2O)2]·1.5H2O 901.38	25–105	2.99	3.01	(i) Loss of 1.5 lattice H2O
	105–183	9.43	9.52	(ii) Loss of 2 coordinated H2O + 0.5O2 + 0.5H2 + CH3
	183–276	17.76	17.52	(iii) Loss of C4H4N2O3S fraction
	276–391	20.77	20.84	(iv) Loss of C6H4 + C5H7N2O fractions
	391–800	41.20	41.40	(v) Loss of C17H15N4O4S fraction
H2PIBS-Ni [Ni(H2PIBS)Cl(H2O)3] 535.58	25–188	13.26	12.97	(i) Loss of 3 coordinated H2O + 0.5O2 + 0.5H2 +
	188–392	20.82	21.03	(ii) Loss of 0.5Cl2 + C6H4 fraction
	392–571	23.17	23.36	(iii) Loss of C3H6NO fraction + N2
H2PIBS-Co [Co(H2PIBS)Cl(H2O)3] 535.82	25–174	10.07	9.91	(i) Loss of 3 coordinated H2O
	174–322	12.59	12.85	(ii) Loss of 0.5Cl2 + CH3
	322–389	7.66	7.86	(iii) Loss of C2H3N fraction
	389–577	10.27	10.61	(iv) Loss of C2H2NO fraction
H2PIBS-Fe [Fe(H2PIBS)Cl2(H2O)2] 550.17	25–148	6.54	5.94	(i) Loss of 2 coordinated H2O
	148–273	30.35	29.72	(ii) Loss of Cl2 + C5H6NO fraction
	273–454	17.46	17.72	(iii) Loss of 0.5O2 + 0.5H2 + SO2NH fraction
H2PIBS-Zn [Zn(H2PIBS)2(H2O)2] 876.20	25–113	4.10	4.42	(i) Loss of 2 coordinated H2O
	113–249	6.86	6.89	(ii) Loss of 4CH3 groups
	249–368	13.35	13.46	(iii) Loss of 0.5O2 + 0.5H2 + C3H3N2O fraction
	368–616	24.10	23.53	(iv) Loss of SO2 + C3H3N2O3S fractions