Onium salts QZ (Z = Cl, Br) having a lipophilic (Q = R3NR', where R' = C16H33) or readily extractable (into organic phase) cation (Q = Ph4P) exhibit a high catalytic activity in phase-transfer alkaline hydrolysis of N-benzyloxycarbonylglycine 4-nitraphenyl ester in the two-phase system chloroform-borate buffer (pH 10). No catalytic effect is observed in the presence of hydrophilic ammonium salts [Et4NCl, Et3PhCH2NCl, Me-2(NH2)NCH2CH2N(NH2)Me(2)(.)2Br(-)] and those insoluble in organic solvents [(Me)(3)NNH(CH2)(2)COO- (.) 2H(2)O, Me-2(NH2)NCH2CO-, Me-2(NH2)N(CH2)(3)SO3-]. These data suggest extraction mechanism of the process. The activity of lipophilic cation Q is determined mainly by two factors: its extractibility, on the one hand, and the ability to form micelles, on the other.
作者:O. V. Baranova、V. V. Kosmynin、V. A. Savelova、A. N. Shendrik、N. I. Korotkikh、G. F. Raenko、A. F. Popov
DOI:10.1023/a:1016334125761
日期:——
Onium salts QZ (Z = Cl, Br) having a lipophilic (Q = R3NR', where R' = C16H33) or readily extractable (into organic phase) cation (Q = Ph4P) exhibit a high catalytic activity in phase-transfer alkaline hydrolysis of N-benzyloxycarbonylglycine 4-nitraphenyl ester in the two-phase system chloroform-borate buffer (pH 10). No catalytic effect is observed in the presence of hydrophilic ammonium salts [Et4NCl, Et3PhCH2NCl, Me-2(NH2)NCH2CH2N(NH2)Me(2)(.)2Br(-)] and those insoluble in organic solvents [(Me)(3)NNH(CH2)(2)COO- (.) 2H(2)O, Me-2(NH2)NCH2CO-, Me-2(NH2)N(CH2)(3)SO3-]. These data suggest extraction mechanism of the process. The activity of lipophilic cation Q is determined mainly by two factors: its extractibility, on the one hand, and the ability to form micelles, on the other.
Drozdetskii; Drozdova; Koval'chuk, Russian Journal of Applied Chemistry, 1999, vol. 72, # 12, p. 2101 - 2102
作者:Drozdetskii、Drozdova、Koval'chuk、Tsvinger
DOI:——
日期:——
Surface-active properties of a series of 1,1-dimethyl-1-alkylhydrazinium chlorides
作者:M. G. Shcherban’、T. Yu. Nasretdinova、N. A. Kladova、A. V. Radushev、E. V. Burdakova
DOI:10.1134/s1070427207030159
日期:2007.3
The surface-active properties of a series of 1,1-dimethyl-1-alkylhydrazinium chlorides with C-10-C-18 in length were studied in comparison with Neonol AF 9-12 and Oksifos B surfactants. The limiting wetting angle, detergent and solubilization power, and foaming kinetics of these surfactants were studied in relation to the concentration of formation of monomolecular layer and type of the resulting micellar structures.