ANALYTICAL CHEMISTRY
708 T h e following solvents were tried in a series of crystallization experiments: Skellysolve B, chloroform, carbon tetrachloride, toluene, acetic acid, met,hanol, 95y0 ethanol, and 80% ethanol. T h e last t,wo solvents were made from SD-1 alcohol. 13)- t h e amount of bis-(p-chlorophenyl)methylcarbinol recovered and itmspurit,y, Skellysolve B is best. T w o milliliters per gram are heated t o boiling, filtered, cooled to 0” C., and filtered, and the solid is washed with a little cold Skellysolve B. l l i s t u r e s that contain only 50y0 or less of bis-(p-chloropheny1)methylcarbinol along with ketone and/or ethylene are difficult t o purify. LITERATURE CITED
Bergmann, E.. aiih Boiidi, .I.. Rei-., 64B,1155 (1931). ( 2 ) Fetser, W. R., AK.\L.CHEM.,23, 1062 (1951). (3) Fieser, I,.. “Experiments in Orgaiiir Chemistry,” 2nd ed.. PP. 368-9. Sew ’T‘ork.’ D. C . Heath B. Co.. 1941. (4) Ihid.,pi)’. 381-2. (5) Forrest. J.. Stephenson, 0.. and Watprs, W. d.,J . Chr77i. ISoc.. (1)
’
1946, 333. (6)
Freed, M.. and 1Tymie. -4.M.,IBD. EBG.CHEM.,A S ~ LED., . 8, 275 (193G)
17) Grummitt, 0..Scicucc. 1 1 1 , 361 (1950). (8) Grummitt, O., Buck. .I.,aiid Hecker, E., .J. Am. Chem. Soc.. 67, 2265 (1945).
(9) Grummitt, O., Buck. .L.a n d Jenkins. .1. E., Ibid., 67, 155 (1945). (10) Haller, H. L., tf a / . . Ihid.. 67, 1601 i1945). (11) Kohler, E. P., and Richtmrer, 9.K.. Ihid.,52, 3736 (1930). 1,12) Mitchell, J., ;\s
