Thermodynamic and Extrathermodynamic Studies of Enantioseparation of Imidazolinone Herbicides on Chiralcel OJ Column

Table 4

Temperature dependence of thermodynamic parameters for chiral separation with n-hexane (0.1%TFA)-2-propanol 60/40 (v/v) as mobile phase.

Compound	Temperature; (°C)	ΔΔ𝐻^∘	ΔΔ𝑆^∘	ΔΔ𝐺^∘	𝑄
		kJ mol^−1	J mol^−1 K^−1	kJ mol^−1
Imazapyr	5	9.16	38.16	−1.45	0.86
	10	−0.71	2.97	−1.54
Imazapic	5	−7.68	−22.83	−1.33	1.21
	10	−2.33	−3.77	−1.28	2.19
Imazethapyr	5	2.18	11.25	−0.95	0.70
	10	−1.90	−3.27	−0.99	2.05
Imazamox	5	2.10	11.19	−1.01	0.67
	10	−1.56	−1.86	−1.04	2.97
Imazaquin	5	2.51	10.33	−0.36	0.87
	10	1.03	5.07	−0.38	0.72