Physical Properties of 3-Butylsydnone

Abstract

The physical properties of 3-butylsydnone at various temperatures were investigated by dielectric constant, refractive index, density and viscosity measurements. The dielectric constant (ε) were obtained by 1 MHz and 300 kHz. The dielectric constant at 1 MHz at any temperature is about 2-3 larger than that at 300 kHz (Fig.2). For example, these values at 25 °Cwere found to be 77.9 and 75.1, respectively. Both dielectric constants at the given frequencies for 3-butylsydnone are approximately expressed by the cubic equations of temperature. The refractive index (n D) and density (ρ) for 3-butylsydnone decrease linearly with increase of temperature (Figs.4 and 6). The linear relationship between εand nD² is found in a range from 15 to 60 °C(Fig.5). The Kirkwood equation for 3-butylsydnone holds over the range from 10 to 80 °C(Fig.7). The viscosity (η) of 3-butylsydnone decreases markedly with increase of temperature, as shown in Fig.8. In addition, it seems that the viscosity of four kinds of 3-alkylsydnone becomes equal at higher temperature. A plot of logη vs.17 for 3-butylsydnone gives a straight line. The activation energy of viscosity for 3-butylsydnone calculated from the slope of the line was found to be 29.3 kJmol^-1