Investigation of the intermolecular interaction of nitrogen heterocycles of the purine and pyrimidine groups in aqueous solutions by the NMR method

1973 ◽  
Vol 22 (5) ◽  
pp. 1001-1007
Author(s):  
V. L. Antopovskii ◽  
A. S. Gukovskaya ◽  
G. V. Nekrasova ◽  
B. I. Sukhorukov ◽  
I. I. Chervin
Keyword(s):  
Aqueous Solutions ◽  
Intermolecular Interaction ◽  
Nitrogen Heterocycles ◽  
Nmr Method

Intermolecular interaction in aqueous solutions of tetramethylurea

1994 ◽  
Vol 75 (1-4) ◽  
pp. 311-316
Author(s):  
L. Cser ◽  
T. Grósz ◽  
Yu. M. Ostanevich
Keyword(s):  
Aqueous Solutions ◽  
Intermolecular Interaction

scholarly journals Search for a Primary Isotopic Effect on the Magnetic Shielding of the Rubidium and Cadmium Isotopes

1973 ◽  
Vol 28 (3-4) ◽  
pp. 484-486
Author(s):  
H. Krüger ◽  
O. Lutz ◽  
A. Nolle ◽  
A. Schwenk ◽  
G. Stricker
Keyword(s):  
Aqueous Solutions ◽  
Optical Pumping ◽  
High Accuracy ◽  
Isotopic Effect ◽  
Magnetic Shielding ◽  
Nmr Method ◽  
Free Atoms ◽  
Limits Of Error

AbstractThe ratios of the gI-factors of 85Rb and 87Rb and of 111Cd and 113Cd have been measured in aqueous solutions of salts by the NMR method with high accuracy. A comparison with the same ratios measured by optical pumping techniques in free atoms shows agreement within the limits of error of 2.3 · 10-6 in the case of rubidium and of 3 · 10-7 in the case of cadmium: No difference in the magnetic shielding between the isotopes is observable.

Fourier-Kernresonanzuntersuchungen an 10 B und 11 B in wäßriger Lösung / Fourier Transform NMR Studies of 10 B and 11 B in Aqueous Solutions

1975 ◽  
Vol 30 (8) ◽  
pp. 955-958 ◽  
Author(s):  
B. W. Epperlein ◽  
. Lutz ◽  
A. Schwenk
Keyword(s):  
Fourier Transform ◽  
Aqueous Solutions ◽  
Hyperfine Interaction ◽  
Magnetic Moment ◽  
Ground State ◽  
Magnetic Shielding ◽  
Nmr Studies ◽  
Nmr Method ◽  
Atomic Ground State ◽  
Nmr Signals

Abstract The ratios of the Larmor frequencies of 10 B and 2 H and of 11 B and 10 B have been measured with the NMR method and a magnetic moment has been calculated for 10 B in the B (OH)4- -ion. For this, an investigation of the dependence of the NMR signals of 10 B and 2 H on the concentration of some boron salts in solutions of H2O and D2O was necessary. Using hyperfine interaction constants from literature, the hyperfine structure anomaly 10 ∆ 11 of boron in the 2 P1/2 atomic ground state has been calculated. A difference in the magnetic shielding between the isotopes 10 B and 11 B in different compounds could not be detected.

Partial molar volume of methanol in water: Effect of polarizability

2009 ◽  
Vol 74 (4) ◽  
pp. 559-563 ◽  
Author(s):  
Filip Moučka ◽  
Ivo Nezbeda
Keyword(s):  
Aqueous Solutions ◽  
Molar Volume ◽  
Intermolecular Interaction ◽  
Feasibility Study ◽  
Partial Molar Volume ◽  
Water Effect ◽  
Ambient Conditions ◽  
Cpu Time ◽  
Low Alcohol ◽  
Very High

The available pairwise additive intermolecular interaction models used so far in simulations in combination with common combining rules do not seem to be able to reproduce the most distinct feature of aqueous solutions of alcohols, the minimum of the partial molar volume at low alcohol concentrations. Nonetheless, this fundamental failure seems to have been paid little attention to, partly because of very high requirements for accuracy and, hence, CPU time of simulations. As an attempt to go beyond empirical combining rules and account in a more physical and yet simple way for the cross interactions, a feasibility study has been undertaken using a polarizable model of water in molecular simulations of the water–methanol mixture at ambient conditions. It turns out that the inclusion of polarizability may qualitatively change the behavior of the mixture bringing the result in agreement with experiment.

Structures of Bismuth(III) Complexonates in Aqueous Solutions Studied by1H NMR Method

2004 ◽  
Vol 30 (8) ◽  
pp. 555-558
Author(s):  
T. A. Babushkina ◽  
E. V. Kovaleva ◽  
T. P. Klimova ◽  
L. A. Zemnukhova ◽  
N. Yu. Krainova
Keyword(s):  
Aqueous Solutions ◽  
Nmr Method
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