Conductances, viscosities, and densities have been determined at 25° intervals between −50° and 125°C for moderately concentrated solutions of Bu4NI , KSCN , and NH4normalBr in N,N‐dimethylformamide. Results are summarized for the fitting of the experimental data as functions of temperature and molality to appropriate equations by computer least squares procedures. Activation energies of viscous flow and conductance, molar conductance ‐viscosity products, and specific conductance maxima also are discussed.

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The viscosities and densities of four tetramethyldicarboxamides, tetramethylpimelamide, tetramethylazelamide, tetramethylsuberamide, and tetramethylsebacamide, were measured throughout the entire aqueous solubility range of these compounds at 25°C. An interesting feature of the partial molal volume behavior patterns of the amides is the presence of a minimum in the partial molal volume and a maximum in viscosity occurring at definite integral mole fractions for the odd C homologs, tetramethylpimelamide and tetramethylazelamide. Since these occurrences were not observed in the even C analogs, tetramethylsuberamide and tetramethylsebacamide, a stronger amide-water interaction is indicated for the odd C amides.

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