Polyethylene Glycol Mediated Kinetic Study of Nitro Decarboxylation of α,β-Unsaturated Acids by Blau’s Fe(III) Phen Complex

Table 4

Thermodynamic parameters involving formation constant (𝐾₁).

Substrate	PEG	𝐾1	Δ𝐻	Δ𝐺	Δ𝑆
		dm^3 mol^−1 at 310 K	kJ/mol		J/K/mol
Cinnamic acid	200	0.307	14.9	3.0	38.2
	300	0.067	44.8	4.4	130
	400	0.618	22.8	1.2	69.6
	600	0.350	6.6	2.7	12.6
Crotonic acid	200	0.176	137	3.61	430
	300	0.078	126	6.85	384
	400	0.356	118	10.21	347
	600	0.224	128	5.35	395
Acrylic acid	200	0.618	25.0	1.2	76.7
	300	0.172	50.7	4.5	149
	400	0.085	20.2	6.3	44.0
	600	0.362	9.6	2.00	22.4
Methoxy cinnamic acid	200	0.284	21.7	3.2	59.7
	300	0.123	44.8	4.3	130
	400	0.281	30.1	3.3	86.7
	600	0.350	6.6	2.7	12.6
Nitro cinnamic acid	200	0.350	14.9	3.04	38.3
	300	0.470	23.5	2.0	69.6
	400	0.109	52.0	5.7	149
	600	0.119	69.6	5.5	206