ing relationships are apparent upon inspection of the table.Vapor pressures of m-tolyl derivatives are higher than those of p-tolyl derivatives for all compounds examined here. This is also true for the m-cresol-p-cresol parent compounds, where the vapor pressure ratio is 1.025 a t 100°C. However, this behavior continues to the boiling point for the derivatives, whereas with the cresols the metaisomer has the higher boiling point a t atmospheric pressure. The greatest vapor pressure difference occurs with the trifluoroacetates where a ratio of 1.080, m-ip-, exists a t 100" C. The ratio a t 100°C. for the pentafluoropropionates is 1.028, indicating that any isomeric effect diminishes when the presence of a larger ester group makes the aromatic portion a smaller fraction of the total molecuIe. Fluorination of the acetate causes both a marked increase in vapor pressure and an increase in the m-lp-ratio, the acetate ratio being 1.021.The butyl esters show a similar vapor pressure increase upon fluorination. The vapor pressure of the n-butyl tertbutyl ether is slightly higher than that of the trimethylsilyl analog, which might be expected in view of the higher atomic weight of silicon. LITERATURE CITED(1) (2) Auwers, K.V., Schmelzer, A., Sitzber. Ges. Befoerder Ges. Naturn. M a r b q 62, No. 4, 113.

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Therrnodynarnic data for the formation of adducts of iodine with a series of amides of the type RC S(CHa)z are reported.The enthalpies of forma-Deviations are These deviations are explained by consider-Compounds investigated include those in which R is either a -H, -C2H3, -CH2C1 or -CC13 group. tion agree well with those expected from the inductive effect of the R group as measured by the g* values. ciicountered when the equilibrium constants are compared with the u* values. ing the entropy effects that can arise from the rotational isomers that probably exist for some of these amides.

The chlorination of mixtures of uranium and fission product oxides in various moltenhalide systems by sparging with a chlorine-carbon monoxide mixture was investigated. The chlorination reaction causes the suspended oxide to formi species that are soluble in the molten salt and removes some of the fission product elements by volatilization of the chlorides. The rate of oxide dissolution and the fission product behavior both proved to be dependent upon the composition of the molten halide mediura used.