Extraction of Sodium Picrate by 3m-Crown-m Ethers and Their Monobenzo Derivatives (m = 5, 6) into Benzene: Estimation of Their Equilibrium-Potential Differences at the Less-Polar Diluent/Water Interface by an Extraction Method

Table 1

Extraction data of the NaPic systems with L into Bz at 25°C.

L	(/V)	()		()	(/V)
15C5	−4.11 ± 0.27; (−0.24)	−3.14 ± 0.22,; −4.11 ± 0.38; (0.0060)	3.909 ± 0.007,; 3.889 ± 0.008,; 4.67 [12–15]	7.0 ± 0.2; (3.5 × 10^−7)	−1.51 ± 0.38,; −1.3; (−0.15)
B15C5	−4.7 ± 3.4; (−0.21)	−5.99 ± 6.7,; −6.50 ± 0.39; (0.023)	3.178 ± 0.008,; 3.18 ± 0.01,; 3.378 [12–15]	9.7 ± 0.4; (1.3 × 10^−7)	−1.13 ± 0.39,; −0.6; (−0.1)
18C6	−4.21 ± 0.16; (−0.24)	−3.18 ± 0.31,; −3.73 ± 0.23; (0.010)	3.45 ± 0.02,; 3.40 ± 0.03,; 3.84 [12–15]	6.6 ± 0.3; (5.3 × 10^−7)	−1.55 ± 0.24,; −1.6; (−0.14)
B18C6	−5.2 ± 3.7; (−0.18)	−7.8 ± 15.5,; −8.03 ± 0.38; (0.010)	3.062 ± 0.002,; 3.060 ± 0.004,; 3.162 [12–15]	11.1 ± 0.4; (2.4 × 10^−8)	−2.73 ± 0.38,; −2.7; (−0.0)

Values obtained from the analyses of the   versus plots. See the text for the evaluation. Values obtained from the analyses of the   versus plots. Mean values of ionic strength for the w or the Bz phase. Values calculated from the thermodynamic relation, . Mean values calculated from the relation, . Mean values calculated from the relation, at 25°C. Mean values calculated from the relation, . Values calculated from the thermodynamic relation, . Values calculated from the values of footnote h for convenience, because the values of footnote c showed the larger calculation errors.