The Cryoscopic Behavior of 1,1-Dimethylcyclohexane Containing Certain Hydrocarbon Impurities

Abstract

NOTES 361Since the dispersion of both the refractivity and impurities. This study was prompted by the the Verdet constant is governed by the term observation that introduction of a small amount of ZAi/(vi2 -v2), constancy of the ratio A V / A n cis-1,2-dimethylcyclohexane as an impurity in 1,lwould be indicative of the fact that the electronic dimethylcyclohexane caused an increase in the transitions responsible for both are identical. The freezing point of the latter hydrocarbon, instead data in the last column show that this expecta-of the normal lowering. Although similar irtion is essentially fulfilled, as has also been found regularities caused by solid solution formation for various aliphatic oxygen compounds.s have been observed in several binary hydrocarbon systems studied in detail by 0 t h ~~r k e r~,~~ it was thought that this new information would SHELL DEVELOPMENT COMPANY EMERYVILLE, CALIF.RECEIVED MAY 24,1948 prove helpful because of the widespread reliance on cryoscopic data as criteria of purity. The results of this investigation are summarized

Petroleum

“…Evans et al (29) reported irregularities involving increases in freezing point instead of decreases upon introduction of small amounts of one hydrocarbon into another, due to solid solution effect. Some solutes produced only a fraction of the normal lowering.…”