Evaluation of the Hydrophilic Property of Sodium Ion-pair Complexes with 3m-Crown-m Ethers (m = 5, 6) and Their Benzo-derivatives by Solvent Extraction

Solvent Extraction of Sodium Permanganate by Mono-benzo 3m-Crown-m Ethers (m = 5, 6) into 1,2-Dichloroethane and Nitrobenzene: a Method which Analyzes the Extraction System with the

“…Obviously, these differences are due to those in log K D,NaLA between these systems: log (K D,NaLPic /K D,NaLMnO4 ) = 1.37 for L = B15C5 and 1.76 for B18C6. These results are the same as those reported previously for the extraction systems with 15C5 and 18C6 (Kudo et al, 2003;2008).…”

“…(19) (Figure 2 as an example). Table 1 lists these values determined, together with other component equilibrium constants available in the references (Kudo et al, 2008;2006a;1991;1996;Katsuta and Takeda, 2003); 15C5 and 18C6 in this table denote 15-crown-5 and 18-crown-6 ethers, respectively. In addition to the values in Table 1, the log K NaMnO4 values at the given I, estimated from the value at I  0 (Kudo et al, 2003), were 0.82 for the DCE extraction systems with B15C5 and B18C6, 0.87 for NB with B15C5, and 0.89 for NB with B18C6 on the average.…”

Evaluation of the Hydrophilic Properties of Crown Ether-ion-pair Complexes with Alkali Metal Picrates by Their Distribution into Less-polar Diluents

“…The same order was observed for the NaA-15C5 extraction systems, 10 except for A -= Dnp -. Also, the order corresponded in part to that of the hydration free energy (DG 0 h) 14,15 for A -: Pic -(-DG 0 h = 197, 165 kJ mol -1 ) < MnO4…”

“…In other words, this means that the Cw,MLA value becomes a hydrophilic measure for A -at a fixed ML + , as reported previously. 10 The order of Cw,MLA coincided with the reverse order of log KD,Na(18C6)A for the distribution into DCE: Fig. 1), the order of log Kex among the NaA-18C6 extraction systems does not completely reflect that of log KD,Na(18C6)A.…”

“…(2) becomes (log KD,MLA)/(VMLA/VL)max, being reported previously. 10 Using the Cw,L and g values, the cohesive energy densities, Cw,MLA, of MLA were evaluated at 298 K from…”