Vapor pressure data for phenol, o-cresol, m-cresol, pcresol, four mixtures of mand p-cresol, o-phenylethylphenol, and p-phenylethylphenol were determined by a modified Ramsay-Young procedure. The data show that there is no evidence of a constant boiling mixture of mand p-cresol which boils lower than the ,components. Data on the vapor pressure of 0-and p-phenylethylphenol are presented for the first time.HE vapor pressure data for phenol, o-cresol, m-cresol, p-T cresol, and four mixtures of mand p-cresol were obtained in 1941 during an investigation of the possibility of the existence of a constant boiling mixture of m-and p-cresol. The boiling points of these t n o materials are very close together (Table I). The close proximity of the boiling points does not preclude the eaistence of a constant boiling mixture of the two materials. The data for 0-and p-phenylethylphenol were determined in 1943. The structural formulas for the latter compounds arc:The materials used in the investigation were purified, 11-here possible, by a distillation in which the foreruns and residues were discarded and only the middle fraction boiling over a narrow range of a f w tenths of a degree was collected. The p-phenylethylphcnol was purified by a recrystallization from a petroleum ether of 30-60" C. boiling range until a maximum melting point of 57" C. was reached.The mixtures of m-and p-cresol were prepared by weighing the purified components. The composition of the mixtures is given in Table 11.The apparatus used is a modification of the Ramsay-Young equipment (1). The change consists in shortening the neck of the distilling flask so that the more difficultly volatile phenols and cresols distill into the cooled flask and do not condense back.
In the article titled “Some preliminary investigations of the phenol‐formaldehyde reaction” by Dr. T. T. Jones (J. Soc. chem. Ind. 1946, 65, 264), this statement is made in the summary: “In alkaline media, dialcohols also seem to be produced more readily, as indicated by the fact that a first order rate law is obeyed until about 45% of the formaldehyde bas reacted.”
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