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  • 1
    Electronic Resource
    Electronic Resource
    Conductances of some electrolytes in 2-methylpyridine-N-oxide at 55°C (1982)
    Springer
    Journal of solution chemistry 11 (1982), S. 55-62 
    Details
    ISSN: 1572-8927
    Keywords: 2-methylpyridine-N-oxide ; electrolytic conductance ; ionic conductance ; tetraalkylammonium ions ; alkali metal ions ; bromides ; iodides ; tetraphenylborates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Conductance measurements for fifteen uni-univalent salts in 2-methylpyridine-N-oxide (2-MPO) were made over the concentration range of 2−120×10−4 mol-dm−3 at 55°C. All conductance data were evaluated by the Lee-Wheaton equation. The results indicate that all of the salts studied are slightly associated in 2-MPO, which is, nevertheless, a reasonably good ionizing solvent compared to other solvents having a similar value for the dielectric constant. The tetraalkylammonium halides are weaker electrolytes than the tetraphenylborate salts in 2-MPO. Ionic limiting molar conductances were obtained by using as a reference electrolyte tris(iso-pentyl)butylammonium tetraphenylborate. Anions appear to be poorly solvated in this solvent but certain cations, particularly Na+ and K+, show evidence of specific ion-solvent interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00664334
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Some solvent properties of 3-methylsydnone (1980)
    Springer
    Journal of solution chemistry 9 (1980), S. 553-561 
    Details
    ISSN: 1572-8927
    Keywords: 3-Methylsydnone ; aqueous solvent mixtures ; dielectric constants ; viscosities ; excess volumes ; refractive indices ; electrolytic conductances
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The behavior of selected solutes in 3-methylsydnone (ε=144.0 at 40°C) was studied. Water is miscible with 3-methylsydnone in all proportions. The dielectric constants, viscosities, densities, and refractive indices of aqueous solutions of 3-methylsydnone have been determined at 40.0°C. A large dielectric decrement was observed, particularly at high 3-methylsydnone mole fraction; however, the excess volumes were found to be relatively small. Conductances were determined for four salts in pure 3-methylsydnone, also at 40°C. The conductance data, as analyzed by the Justice equation, indicated that 3-methylsydnone is a good ionizing medium. Use of tris(isopentyl)butylammonium tetraphenylborate as a reference electrolyte allowed estimation of limiting molar conductances of several ions. Bromide ions. Bromide ions are probably poorly solvated in 3-methylsydnone relative to sodium and potassium ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00649030
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Conductance behavior of 1:1 electrolytes in 3-methyl-2-oxazolidone at 25°C (1983)
    Springer
    Journal of solution chemistry 12 (1983), S. 563-571 
    Details
    ISSN: 1572-8927
    Keywords: 3-Methyl-2-oxazolidone ; electrolytic conductances ; limiting ionic conductances ; tetraalkylammonium ions ; iodides ; bromides ; tetraphenylborates ; perchlorates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The conductance behavior of twenty-five 1∶1 electrolytes has been investigated in 3-methyl-2-oxazolidone (3Me20x) at 25°C. Conductance data were analyzed by the Lee-Wheaton equation, and all salts studied were found to be only slightly associated. Ionic limiting equivalent conductances were obtained using tris(iso-pentyl)butylammonium tetraphenylborate as a reference electrolyte. The relative values of the ionic limiting molar conductance are generally similar to those for other dipolar aprotic solvents. However, the order $$\lambda _0 (i - Pent_3 BuN^ + ) 〉 \lambda _0 (Pent_4 N^ + )and\lambda _0 (Br^ - ) 〉 \lambda _0 (ClO_4^ - )$$ is opposite to that found previously in the similar solvent 3-tert-bytyl-2-oxazolidone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01150848
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  • 4
    Electronic Resource
    Electronic Resource
    Conductance behavior of 1∶1 electrolytes in N,N-dimethylmethanesulfonamide (1983)
    Springer
    Journal of solution chemistry 12 (1983), S. 599-605 
    Details
    ISSN: 1572-8927
    Keywords: N,N-dimethylmethanesulfonamide ; electrolytic conductances ; dipolar aprotic solvents ; limiting ionic conductances ; tetra-substituted ammonium halides ; tetraphenylborates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The conductances of eleven 1:1 salts have been measured at 50°C in N,N-dimethylmethanesulfonamide (DMMSA) for electrolyte concentrations of 1.2−55.0×10−4 mol-dm−3. The conductance data were analyzed using the equation of Lee and Wheaton. Calculations for different values of the distance parameter R indicate that all salts studied are only slightly associated in DMMSA. Association was somewhat greater for the trimethylphenylammonium halides than for the tetraalkylammonium salts. Ionic limiting molar conductances were estimated using the tris (isopentyl) butylammonium tetraphenylborate approximation. The markedly smaller value for λo (Na+) compared to the values for λo (Br−) and λo (I−) indicates that the sodium ion is probably more extensively solvated than the halide ion. In general, it appears that DMMSA (dielectric constant=80.31 at 50°C) is similar in its solvent properties to dipolar aprotic heterocyclic solvents such as 2-cyanopyridine and 3-methyl-2-oxazolidone which have similar dielectric constants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00648664
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    Paper (German National Licenses)
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