Table 4.

The van’t Hoff model parameters (a and b), R² and RMSD (%) for PPD in various neat solvents (S).

S	a	b	R 2	RMSD (%)	Overall RMSD (%)
Water	0.22	−3669.00	0.9970	1.54
Methanol	5.10	−3304.80	0.9960	1.70
Ethanol	3.44	−2623.30	0.9985	0.74
EG	5.76	−3228.70	0.9974	1.44
IPA	4.30	−2724.80	0.9947	1.69
PG	3.70	−2521.30	0.9953	1.45	1.16
1-Butanol	4.67	−2715.70	0.9990	0.82
2-Butanol	4.62	−2693.10	0.9979	1.29
EA	3.94	−2113.70	0.9961	1.14
Transcutol	2.30	−1072.50	0.9940	0.75
PEG-400	3.00	−1238.00	0.9977	0.70
DMSO	1.63	−759.30	0.9991	0.77