Polarographic studies with the dropping mercury kathode. LXX. The hydrogen overpotential in mixtures of light and heavy water and the separation coefficient

1937 ◽  
Vol 9 ◽  
pp. 345-359 ◽  
Author(s):  
J. Heyrovský
Keyword(s):  
Heavy Water ◽  
Separation Coefficient ◽  
Hydrogen Overpotential

scholarly journals Experiments on heavy hydrogen. III. -The electrolytic separation of the hydrogen isotopes

1934 ◽  
Vol 146 (858) ◽  
pp. 623-629 ◽  
Keyword(s):  
Heavy Water ◽  
Separation Factor ◽  
Hydrogen Isotopes ◽  
Separation Coefficient ◽  
Residual Water ◽  
Common Mode ◽  
Light Water

The object of the present paper is to all call attention to a fact which may play an important role hitherto not considered in the electrolytic separation of the hydrogen isotopes. As is well known the most common mode of preparation of heavy hydrogen is the electrolytic method based on the original discovery of Washburn and Urey. If water containing a certain amount of heavy water be electrolysed under suitable conditions, the light water is more readily decomposed than the heavy water and the heavy hydrogen remains preferentially in the residual water. The separation of the heavy hydrogen proceeds formally according to the formula H 0 /H . (D/D 0 ) s = (V 0 /V) s - 1 , where H 0 and D 0 , H and D denote the initial and final concentrations of light and heavy hydrogen respectively in the water,and V 0 and V are the initial and final volumes of the electrolysed water. s is the so-called "separation factor" or separation coefficient" indicating how many times more readily the light water is decomposed than the heavy one.

Calculation of Equilibrium Constant for Dimerization of Heavy Water Molecules in Saturated Vapor

2015 ◽  
Vol 60 (3) ◽  
pp. 263-267
Author(s):  
L.A. Bulavin ◽  
◽  
S.V. Khrapatyi ◽  
V.M. Makhlaichuk ◽  
Keyword(s):  
Equilibrium Constant ◽  
Heavy Water ◽  
Saturated Vapor ◽  
Water Molecules

Carbon-13 and nitrogen-14 NMR spectra of 1-(substituted phenyl)pyridinium salts

1980 ◽  
Vol 45 (10) ◽  
pp. 2766-2771 ◽  
Author(s):  
Antonín Lyčka
Keyword(s):  
Heavy Water ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Coupling Constants ◽  
Pyridinium Salts ◽  
Nmr Signals ◽  
C Nmr

The 13C and 14N NMR spectra of 1M solutions of 1-(substituted phenyl)pyridinium salts (4-CH3, 4-OCH3, H, 4-Cl, 4-Br, 4-I, 3-NO2, 4-NO2, 2,4-(NO2)2 (the 13C NMR only)) have been measured in heavy water at 30 °C. The 13C and 14N chemical shifts, the 1J(CH) coupling constants, some 3J(CH) coupling constants, and values of half-widths Δ 1/2 of the 14N NMR signals are given. The 13C chemical shifts of C(4) correlate with the σ0 constants (δC(4) = (1.79 ± 0.097) σ0 + (147.67 ± 0.041)), whereas no correlation of the nitrogen chemical shifts with the σ constants has been found. The half-widths Δ 1/2 correlate with the σ0 constants (Δ 1/2 = (76.2 ± 4.9) σ0 + (106.4 ± 2.2)) except for 1-phenylpyridinium chloride.

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