scholarly journals Solvent Isotope Effect on Electric Conductivity of Halide Ions in Water under High Pressure.

1992 ◽  
Vol 41 (462) ◽  
pp. 312-317 ◽  
Author(s):  
Masakatsu UENO ◽  
Noriaki TSUCHIHASHI ◽  
Kiyoshi SHIMIZU
Keyword(s):  
High Pressure ◽  
Electric Conductivity ◽  
Isotope Effect ◽  
Halide Ions ◽  
Solvent Isotope Effect ◽  
Solvent Isotope

Neutral Solvolysis of Acyl Carbon and the Temperature Dependence of the Kinetic Solvent Isotope Effect

1975 ◽  
Vol 53 (6) ◽  
pp. 869-877 ◽  
Author(s):  
B. Rossall ◽  
R. E. Robertson
Keyword(s):  
Temperature Dependence ◽  
Isotope Effect ◽  
Solvent Isotope Effect ◽  
Acyl Carbon ◽  
Rate Of Hydrolysis ◽  
Solvent Isotope ◽  
Neutral Conditions ◽  
Hydrolysis Of

The temperature dependence of the rate of hydrolysis of benzoic, phthalic, and succinic anhydrides have been determined in H2O and D2O under "neutral" conditions. Corresponding data have been obtained for methyl trifluoroacetate. While both series supposedly react by the same BAc2 mechanism, remarkable differences are made obvious by this investigation. Possible sources of such differences are proposed.

An Unusual Solvent Isotope Effect in the Reaction of W(CO)5(solv) (solv = Cyclohexane or Cyclohexane-d12) with THF

2000 ◽  
Vol 19 (9) ◽  
pp. 1682-1691 ◽  
Author(s):  
Riki Paur-Afshari ◽  
J. Lin ◽  
Richard H. Schultz
Keyword(s):  
Isotope Effect ◽  
Solvent Isotope Effect ◽  
Solvent Isotope

Notizen: 67Zn NMR Anomalous Solvent Isotope Effect in Aqueous Solutions

1974 ◽  
Vol 29 (4) ◽  
pp. 660-661 ◽  
Author(s):  
B. W. Epperlein ◽  
H. Krüger ◽  
. Lutz ◽  
A. Schwenk
Keyword(s):  
Aqueous Solutions ◽  
Isotope Effect ◽  
Solvent Isotope Effect ◽  
Zinc Bromide ◽  
The Difference ◽  
Solvent Isotope

For 67Zn NMR lines of solutions of ZnCl2, ZnBr2, and ZnI2 in H2O and D2O an anomalous solvent isotope effect is reported. In D2O solutions the lines are shifted to higher frequencies. The difference between the shieldings in H2O and D2O is e.g. σ(H2O) - σ(D2O) = (13.1 ±0.7) ppm for a concentration of 0.02 moles zinc bromide per mole solvent.

scholarly journals One-proton catalysis by the α-l-arabinofuranosidase III of Monilinia fructigena

1988 ◽  
Vol 254 (3) ◽  
pp. 899-901 ◽  
Author(s):  
T Selwood ◽  
M L Sinnott
Keyword(s):  
Isotopic Composition ◽  
Isotope Effect ◽  
Solvent Isotope Effect ◽  
Monilinia Fructigena ◽  
Single Proton ◽  
Solvent Isotope ◽  
Hydrolysis Of

1. Michaelis-Menten parameters for the hydrolysis of p-nitrophenyl alpha-L-arabinofuranoside were measured as a function of pL (pH or pD) in both 1H2O and 2H2O. 2. The variation of both Vmax. and Vmax./Km with pL is sigmoid, the pK governing Vmax. shifting from 6.34 +/- 0.05 in 1H2O to 6.84 +/- 0.07 in 2H2O, and that governing Vmax./Km from 5.89 +/- 0.03 in 1H2O to 6.38 +/- 0.05 in 2H2O. 3. In the plateau regions there is a small inverse solvent isotope effect on Vmax./Km (0.92), and one of 1.45 on Vmax. 4. The variation of Vmax. with isotopic composition is strictly linear, indicating that the isotope effect arises from the transfer of a single proton.

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