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1.
Summary From extraction experiments and<span style='font-size:12.0pt;font-family:Symbol; mso-bidi-font-family:Symbol'>g-activity measurements,
the extraction constant corresponding to the equilibrium Ba2+(aq)+SrL2+(nb)?BaL2+(nb)+Sr2+(aq) taking place in the two-phase water-nitrobenzene system (L= valinomycin; aq= aqueous phase,</o:p>nb= nitrobenzene phase)
was evaluated as logKex(Ba2+, SrL2+)=1.3. Furthermore, the stability constant of the valinomycin-strontium complex in nitrobenzene saturated with water was calculated
for a temperature of 25 °C: logbnb(SrL2+)=5.4. 相似文献
2.
E. Makrlík P. Vańura V. Bečková 《Journal of Radioanalytical and Nuclear Chemistry》1999,241(3):659-661
From extraction experiments and γ-activity measurements, the extraction constant corresponding to the equilibrium Pb2+(aq)+SrL2
2+(nb)⇆PbL2
2+(nb)+Sr2+(aq) taking place in the two-phase water-nitrobenzene system (L=15-crown-5; aq = aqueous phase, nb = nitrobenzene phase) was
evaluated: logK
ex (Pb2+,SrL2
2+)=3.0. Further, the stability constant of the PbL2
2+ complex in nitrobenzene saturated with water was calculated: log βnb(PbL
2
2+
)=17.8 相似文献
3.
Summary From extraction experiments andg-activity measurements, the extraction constant of the Ba2+(aq)+2A-(aq)+L(nb)?BaL2+(nb)+2A-(nb) equilibrium in the two-phase water-nitrobenzene system (L = p-tert-butylcalix[4]arene-tetrakis (N,N-diethylacetamide); aq = aqueous phase, nb = nitrobenzene phase) was evaluated as logKex(BaL2+,2A-)=6.5±0.1. Furthermore, the stability constant of the p-tert-butylcalix[4]arene-tetrakis (N,N-diethylacetamide)̵barium complex in nitrobenzene saturated with water was calculated for
at 25 °C as logbnb(BaL2+)=15.4±0.1. 相似文献
4.
From extraction experiments with22Na as a tracer, the extraction constant corresponding to the equilibrium Ba2+(aq)+2NaL+(nb)⇄ ⇄BaL2
2+(nb)+2Na+(aq) taking place in the two-phase water-nitrobenzene system (L=15-crown-5; aq=aqueous phase, nb=nitrobenzene phase) was evaluated
as logK
ex
(Ba2+,2NaL+)=3.3±0.1. Further, the stability constant of the complex BaL2
2+ in nitrobenzene saturated with water was calculated: log βnh(BaL
2
2+
)=16.4±0.1. 相似文献
5.
E. Makrlík P. Vaňura M. Daňková 《Journal of Radioanalytical and Nuclear Chemistry》1999,242(1):185-187
From extraction experiments and γ-activity measurements, the extraction constant corresponding to the equilibrium 2Li+(aq)+SrL2
2+(nb) 2LiL+(nb)+Sr2+(aq) taking place in the two-phase water-nitrobenzene system (L=15-crown-5; aq=aqueous phase, nb=nitrobenzene phase) was evaluated
as logK
ex
(2Li+;SrL2
2+)=−3.7. Further, the stability constant of the 15-crown-5—lithium complex in nitrobenzene saturated with water was calculated:
log βnh(LiL+)=7.0. 相似文献
6.
Summary From extraction experiments and γ-activity measurements, the extraction constant corresponding to the equilibrium Pb2+(aq)+SrL2+ (nb)↔PbL2+ (nb)+Sr2+ (aq) taking place in the two-phase water-nitrobenzene system (L=PEG 400; aq = aqueous phase, nb = nitrobenzene phase) was
evaluated as logKex(Pb2+, SrL2+)=2.0±0.1. Further, the stability constant of the PEG 400 - lead complex in nitrobenzene saturated with water was calculated
for a temperature of 25 °C: log βnb(PbL2+)=12.9±0.1. 相似文献
7.
E. Makrlík J. Budka P. Vaňura P. Selucký 《Journal of Radioanalytical and Nuclear Chemistry》2008,277(2):487-490
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium
M2+(aq)+SrL2+(nb)⇔ML2+(nb)+Sr2+(aq) taking place in the two-phase water-nitrobenzene system (M2+ = Ba2+, Pb2+, Cd2+; L = tetramethyl p-tert-butylcalix[4]arene tetraketone; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Moreover, the stability constants
of the ML2+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the order Ba2+<Cd2+<Pb2+. 相似文献
8.
From extraction experiments and γ-activity measurements, the extraction constant corresponding to the equilibrium Na+(aq)+HL+(nb)⇆NaL+(nb)+H+(aq) taking place in the two-phase water-nitrobenzene system (L=18-crown-6; aq=aqueous phase, nb=nitrobenzene phase) was evaluated
as logK
ex
(Na+,HL+)=0.1. Further, the stability constant of the 18-crown-6-sodium complex in nitrobenzene saturated with water was calculated:
logβ
nh(NaL+)=8.0. 相似文献
9.
From extraction experiments with 133Ba as a tracer, the extraction constant corresponding to the equilibrium Ba2+(aq) + 2A-(aq) + 2L(nb) BaL2
2+(nb) + 2A-(nb) in the two-phase water-nitrobenzene system (A- = picrate, L = benzo-15-crown-5; aq = aqueous phase, nb = nitrobenzene phase) was evaluated as log K
ex (BaL2
2+, 2A-) = 5.7. Furthermore, the stability constant of the benzo-15-crown-5 - barium complex in nitrobenzene saturated with water was calculated: log bnb (BaL2
2+) = 14.6. 相似文献
10.
M. Daňková E. Makrlík P. Vaňura 《Journal of Radioanalytical and Nuclear Chemistry》2000,245(2):425-426
From several strontium distribution experiments with 85Sr tracer, the extraction constant corresponding to the equilibrium Ca2+(aq)+SrL2+(nb) CaL2+(nb)+Sr2+ (aq) in the two-phase water-nitrobenzene system (L = 18-crown-6; aq = aqueous phase, nb = nitrobenzene phase) was tentatively evaluated as log K
ex (Ca2+,SrL2+) = –1.9±0.1. Furthermore, the stability constant of the calcium — 18-crown-6 complex in nitrobenzene saturated with water was calculated for a temperature of 25 °C: log nb(Cal2+) = 10.1±0.1. 相似文献
11.
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M2+(aq)+SrL2+(nb)⇔ML2+(nb)+Sr2+(aq) taking place in the two-phase water-nitrobenzene system (M2+ = Mg2+, Zn2+, Mn2+; L = valinomycin; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Further, the stability constants of the ML2+ complexes in water saturated nitrobenzene were calculated. They were found to increase in the order of Mg2+<Mn2+<Zn2+. 相似文献
12.
Summary From extraction experiments and γ-activity measurements, the extraction constant corresponding to the equilibrium Li+(aq)+NaL+(nb) ↔LiL+(nb)+Na+(aq) taking place in the two-phase water-nitrobenzene system (L = valinomycin; aq = aqueous phase, nb = nitrobenzene phase)
was evaluated as logKex(Li+,NaL+)=-1.1. Further, the stability constant of the valinomycin-lithium complex species in nitrobenzene saturated with water was
calculated: logβnb(LiL+)=6.3. 相似文献
13.
Summary From extraction experiments andg-activity measurements, the extraction constant corresponding to the equilibrium Pb2+(aq)+SrL(nb)?PbL(nb)+Sr2+(aq)taking place in the two-phase water-nitrobenzene system (L = benzo-15-crown-5; aq = aqueous phase, nb = nitrobenzene phase)
was evaluated aslog Kex(Pb2+,SrL)=0.1±0.1. Further, the stability constant of the benzo-15-crown-5-lead complex in nitrobenzene saturated with water was
calculated for a temperature of25 °C:log bnb(PbL)=13.2±0.1. 相似文献
14.
E. Makrlík 《Journal of Radioanalytical and Nuclear Chemistry》2004,262(2):513-515
From extraction experiments with 85Sr as a tracer, the extraction constant corresponding to the equilibrium Sr2+(aq) + 2A- (aq) + 2L (nb) Û SrL2 ,2+ (nb) 2A- (nb) in the two-phase water-nitrobenzene system (A- = picrate, L = benzo-15-crown-5; aq = aqueous phase, nb = nitrobenzene phase) was evaluated as log K ex 相似文献
15.
Summary From extraction experiments andg-activity measurements, the extraction constant corresponding to the 2Na+(aq)+SrL(nb)?2NaL+(nb)+Sr2+(aq) equilibrium taking place in the two-phase water-nitrobenzene system (L=benzo-15-crown-5; aq=aqueous phase, nb=nitrobenzene
phase) was evaluated as log Kex(2Na+,SrL)=1.0±0.1. Further, the stability constant of the benzo-15-crown-5-sodium complex in nitrobenzene saturated with water
was calculated for a temperature of 25 °C: log bnb(NaL+)=7.8±0.1. 相似文献
16.
From extraction experiments and -activity measurements, the extraction constants corresponding to the equilibrium Cs+(aq)+Cl–(aq)+L(nb)CsL+(nb)+Cl–(nb) in the two-phase water-nitrobenzene system (L=valinomycin; aq=aqueous phase, nb=nitrobenzene phase) was evaluated as log Kex(CsL+, Cl–)=2.2. Further, the stability constant of the valinomycin-cesium complex in nitrobenzene saturated with water was calculated: log nb(Csl+)=10.1. 相似文献
17.
From extraction experiments and -activity measurements, the extraction constant corresponding to the equilibrium Na+(aq)+A–(aq)+L(nb)NaL+(nb)+A–(nb) taking place in the two-phase water-nitrobenzene system (A–=picrate, L= dicyclohexyl-18-crown-6; aq-aqueous phase, nb=nitrobenzene phase) was evaluated as logK
ex(NaL+, A–)=2.6.Further, the stability constant of the dicyclohexyl-18-crown-6-sodium complex in nitrobenzene saturated with water was calculated: nb(NaL+)=7.8. 相似文献
18.
M. Daňková E. Makrlík P. Vaňura 《Journal of Radioanalytical and Nuclear Chemistry》1997,221(1-2):251-253
From the extraction experiments and -activity measurements, the extraction constant corresponding to the Rb+(aq)+CsL+(nb)RbL+(nb)+Cs+(aq) equilibrium in the two-phase water-nitrobenzene system (L=valinomycin; aq=aqueous phase, nb=nitrobenzene phase) was evaluated in the form logK
ex (Rb+, CsL+)=0.9. Further, the stability constant of the valinomycin-rubidium complex in nitrobenzene saturated with water was calculated as log nb(RbL+)=11.7. 相似文献
19.
Summary. From extraction experiments and γ-activity measurements, the extraction constant corresponding to the equilibrium H+(aq) + 1
·Na+(nb) ⇆ 1
·H+(nb) + Na+(aq) taking place in the two-phase water-nitrobenzene system (1 = p-tert-butylcalix[4]arene-tetrakis(N, N-diethylacetamide); aq = aqueous phase, nb = nitrobenzene phase) was evaluated as log K
ex(H+, 1
·Na+) = −1.4 ± 0.1. Further, the stability constant of the p-tert-butylcalix[4]arene-tetrakis(N,N-diethylacetamide)-H+ complex in water saturated nitrobenzene was calculated for a temperature of 25°C as log βnb(1
· H+) = 8.1 ± 0.1. 相似文献
20.
From extraction experiments and γ-activity measurements, the extraction constant corresponding to the equilibrium H+(aq) + 1
·Na+(nb) ⇆ 1
·H+(nb) + Na+(aq) taking place in the two-phase water-nitrobenzene system (1 = p-tert-butylcalix[4]arene-tetrakis(N, N-diethylacetamide); aq = aqueous phase, nb = nitrobenzene phase) was evaluated as log K
ex(H+, 1
·Na+) = −1.4 ± 0.1. Further, the stability constant of the p-tert-butylcalix[4]arene-tetrakis(N,N-diethylacetamide)-H+ complex in water saturated nitrobenzene was calculated for a temperature of 25°C as log βnb(1
· H+) = 8.1 ± 0.1. 相似文献