Distribution of Picric Acid into Various Diluents

Table 1

Extraction constants for HPic into various diluents and their component equilibrium constants (𝐾_HA, 𝐾_D,HA) at 298 K.

Diluents^a	𝐼^b/mol dm^−3	log 𝐾^cex	log K D,HA	log 𝐾HA^d,e
DCE	7.8×10^−4	2.489±0.006	1.90±0.01	0.59
oDCBz	1.0×10^−3	2.170±0.002	1.59±0.01	0.58
DCM	8.4×10^−4	2.462±0.002	1.88±0.01	0.59
CBu	1.0×10^−3	1.474±0.004	0.89±0.01	0.58
CBz	8.5×10^−4	2.310±0.002	1.72±0.01	0.59
BBz	8.7×10^−4	2.300±0.007	1.72±0.01	0.59
CF	3.7×10^−4	1.941±0.003,1.940^f	1.347±0.006,1.650^f	0.594±0.005,0.290^f,g
cHex^h	1.0^i	0.66	−0.16	0.82
Bz	8.1×10^−4	2.396±0.005,2.393^j	1.81±0.01,2.103^j	0.59, 0.290^j,g
TE	6.3×10^−4	2.473±0.006	1.88±0.01	0.59
mX	7.9×10^−4	2.552±0.005	1.97±0.01	0.59

aDCE: 1,2-dichloroethane; oDCBz: o-dichlorobenzene; DCM: dichloromethane; CBu: 1-chlorobutane; CBz: chlorobenzene; BBz: bromobenzene; CF: chloroform; cHex: cyclohexane; Bz: benzene; TE: toluene; mX: m-xylene:. These diluents are lined up downwards from the high-polar DCE to the low-polar mX. bAverage values of 𝐼 in aqueous solutions. ^c𝐾_ex/mol⁻¹ dm³. dAverage values evaluated at 𝐼 and expressed by 𝐾_HA/mol dm⁻³. eErrors of all the log𝐾_HA values evaluated here were ±0.01 except for the CF system. fReference [2]. g Log𝐾_HPic value at (I/mol dm⁻³) = 0.1. See [21]. hReference [8]. iConcentration of HCl. jReference [1].