Ni(II), Cu(II), Mn(II), and Fe(II) Metal Complexes Containing 1,3-Bis(diphenylphosphino)propane and Pyridine Derivative: Synthesis, Characterization, and Antimicrobial Activity

Table 6

Thermodynamic parameters for the thermal decomposition of the compounds.

Complex	Step	ΔS^∗; kJ mol^−1K^−1	ΔH^∗; kJ mol^−1	ΔG^∗; kJ mol^−1
Ni(II) complex	1^st	−190.92	33.98	96.41
		−188.23	46.91	108.46
		−187.09	54.90	116.07
		−185.94	63.08	123.88
		−183.64	83.81	143.86
		−177.70	166.92	225.02
Cu(II) complex	1^st	−190.10	36.50	96.91
		−188.57	44.06	103.98
		−187.81	48.52	108.20
		−187.04	52.81	112.25
		−185.70	62.92	121.93
		−181.87	99.56	157.35
Mn(II) complex	1^st	−203.52	9.77	135.66
		−201.78	13.01	137.83
		−201.19	14.92	139.37
		−200.43	16.83	140.81
		−198.91	21.42	144.46
		−194.69	38.09	158.52
Fe(II) complex	1^st	−194.13	22.39	87.03
		−192.23	28.71	92.72
		−191.46	32.32	96.07
		−190.49	36.12	99.55
		−188.96	44.57	107.49
		−184.56	76.12	137.57