David S. Newman

The ionic hall effect in the solid electrolyte C5H6NAg5I6

The ionic Hall effect was measured in polycrystalline C5H6NAg5I6 at 25°C using an ac electric field and a dc magnetic field. The Hall voltages ranged between 10 and 100nV for magnetic fields of 0.1-T. From these data we calculated the average Ag+ ion mobility, the number of mobile Ag+ ions per cm3, the percentage of free silver ions, and the average relaxation time. We conclude that the exceptionally high ionic conductivity in C5H6NAg5I6 at 25°C probably arises from a relatively small number of mobile Ag+ ions.

Reactions of Coal and Model Coal Compounds in Room Temperature Molten Salt Mixtures

A 2:1 AlCl/sub 3/-pyridinium chloride molten salt solution was used as the reaction medium for the alkylation of diphenylethane and a bituminous coal by 2-propanol. Probably accompanying the room temperature Friedel-Crafts alkylation is a reduction of C=O to -C-OH. Completely deuterated 2-propanol did not react at all with the pyridinium ring. The pyridinium chloride serves to lower the temperature at which the AlCl/sub 3/ is able to catalyze the reactions. The pyridinium chloride also catalyzes the Friedel-Crafts alkylation.

The contribution of non-Brownian motion to transport properties in C5H6NAg5I6, RbAg4I5 and αAgI

Abstract The effect of non-Brownian motion on transport properties in RbAg 4 I 5 , C 5 H 6 NAg 5 I 6 and αAgI has been assessed through a mathematical formalism which compares the measured Hall mobility with the square of the Ohmic mobility. It is found that the two “double salts” behave qualitatively differently than αAgI.

Structure, 1 H NMR Spectra, Thermodynamics, and Transport Properties of Molten Salt Solutions I. 4‐Methylpyridinium Chloride and 4‐Methylpyridinium Iodide

The 1 H NMR spectra of binary mixtures of 4-methylpyridinium chloride and 4-methylpyridinium iodide were measured as a function of temperature and composition over the entire composition range. Correlations were made between these spectra and thermodynamic and transport properties of the melts. The effect of hydrogen bonding on the melts properties was assessed and a four component model was proposed to account for these properties. A pronounced mixed ion effect was observed in the NMR spectra, but was barely discernible in the transport properties and completely absent in the thermodynamic properties.

Two‐Probe Direct Current Measurement of Fused Salt Conductance

A simple dc method has been developed for measuring conductance in fused salt systems using inexpensive equipment. The technique is particularly well suited to salts which are able to dissolve their own metal. Cell constants are obtained using a well studied fused salt as the reference material. Fused BiCl3 and fused NaNO3 were studied; the data are in excellent agreement with literature values. Conductance readings were made at or just above the decomposition potential for the melt being studied.