International Scholarly Research Notices

Research Article

Complex Formation Equilibria between Ag(I) and Thioureas in Propan-2-ol

Table 2

Most probable stability constants (log, as ), standard free energy (as kJ·m⁻¹), enthalpy (as kJ·m⁻¹), and entropy changes (as kJ·K⁻¹·m⁻¹) at K and ionic strength self-determined by [AgNO₃] = 6.36 × 10⁻⁶ − 3.83 × 10⁻⁵ m·dm⁻³for the overall complexing reactions .


Ligand		log	−ΔG°	ΔH°	ΔS°

Tu	1	9.9	56.2	−105 ± 21	−165 ± 71
	2	13.7	78.2	−142 ± 26	−214 ± 88
	3	16.1	92	−140 ± 17	−161 ± 88

MeTu	1	9.6	55	−137 ± 19	−275 ± 64
	2	13.4	76.2	−149 ± 16	−244 ± 54
	3	15.9	90.9	−192 ± 14	−339 ± 48

Me₂Tu	1	8.5	43.8	−160 ± 29	−373 ± 97
	2	12.6	72.3	−131 ± 15	−197 ± 50
	3	15.1	85.9	−173 ± 24	−292 ± 80

Me₄Tu	1	6.1	36.2	−122 ± 29	−288 ± 97
	2	10.5	60.1	−103 ± 17	−144 ± 56
	3	13.3	76.1	−165 ± 53	−298 ± 177

EtTu	1	9.5	54.5	−72 ± 27	−59 ± 90
	2	13.6	77.5	−121 ± 12	−146 ± 42
	3	16.3	93.1	−153 ± 20	−201 ± 60

Et₂Tu	1	9.6	55.0	−157 ± 24	−342 ± 80
	2	13.6	77.4	−134 ± 42	−188 ± 140
	3	16.3	95.1	−186 ± 25	−305 ± 81

EnTu	1	11.5	65.9	−134 ± 24	−230 ± 80
	2	15.3	87.3	−144 ± 12	−190 ± 41
	3	17.2	98.3	−233 ± 38	−452 ± 130