Densities and viscosities for p-xylene with cyclohexane, heptane, octane, and N-methyl-2-pyrrolidone were determined from (298.15 to 353.15) K and at atmospheric pressure. The measurements were carried out over the whole range of composition, using a vibrating-tube density meter and a Ubbelohde viscometer. Density and viscosity measurements were used to compute the excess molar volumes, V E , and viscosity deviations, ∆η. The excess molar volumes, V E , and viscosity deviations, ∆η, have been fit to the Redlich-Kister equation, and the coefficients and estimates of the standard error values are given.

[see reaction]. A new and facile approach to 4-alkylthio-1,3-dithiole-2-thione starting from easily accessible reactants was described. This approach was based on the unusual reaction of a zinc complex of 1,3-dithiole-2-thione-4,5-dithiolate with electrophilic reagents in the presence of 3-picolyl chloride hydrochloride/or 4-picolyl chloride hydrochloride/or pyridine hydrochloride.

Densities and viscosities for the dimethyl carbonate (DMC) + (hexane, heptane, chlorobenzene) binary systems have been experimentally determined from (293.15 to 353.15) K and at normal atmospheric pressure over the entire mole fraction range. Other mixing properties of interest such as the excess molar volumes and the viscosity deviations have also been obtained for each of the systems. The obtained properties have been compared with those reported by other authors in the literature and have been analyzed in terms of the molecular interactions present in this kind of mixture. The excess molar volumes for these three binary systems were positive over the whole composition range at all temperatures. On the contrary, the deviations of viscosity for DMC + hexane and DMC + heptane are negative, and those for DMC + chlorobenzene are very small.