No abstract

No abstract

The specific heats of twelve aromatic hydrocarbons have been measured over a wide range of temperatures. The heats of fusion of seven of these compounds have also been determined.2. The entropies of the twelve hydrocarbons have been calculated from these heat capacity data. The results thus obtained have been found to agree in most cases with the values predicted by means of a simple, empirical equation.3. The corresponding free energies have also been calculated and certain regularities noted. The free energy change in the hydrogenation of benzene to give cyclohexane has been derived in two different ways.

No abstract

No abstract

Care should be taken in handling these materials for during work on the hexenyl compounds the hands of the investigator became poisoned. No remedies appeared to help the itching and burning. The affected parts dried up within three weeks leaving a yellow scar which soon disappeared. Heptenyl DerivativesDiheptenylpyrogallol, (C7HiS)2C8H(OH)3.-This synthesis followed the procedure given for dihexenylpyrogallol (II). From 0.4 mole of pyrogallol and 0.8 mole of 1bromo-2-heptene there was obtained 100 g. of crude reaction product (soluble in benzene and not extracted by alkali) which gave rise to 10 cc. of distillate in a closed system at 200°( 0.001 mm. or less). This 10-cc. portion was

The reaction rate was retarded by increased viscosity.8. The reaction is composed of two separate zero order reactions, the initial reaction being partially chemically and diffusion controlled, and the later reaction being definitely diffusion controlled.9. Thermodynamic considerations and influence of ionic strength, varied by chloride ion addition, indicate that the rate controlling step for the initial part of the reaction is OH-+ OH-+ Cu°= X-. Chicago, Illinois

No abstract