From: Jim Sims (jsims$##$ucrac1.ucr.edu)
Date: Fri Dec 24 1999 - 12:38:21 EST
Dear Everybody Triphenylphosphite (PhO)3P , a moisture
sensitive liquid is made from phenol and PCl3. How does one check the
presence of unreacted phenol in Triphenylphosphite,qualitatively? Aq FeCl3
is not satisfactory as(PhO)3P hydrolyses liberating phenol R.K.IYER
You might use Infrared spectroscopy. The phenol would have an OH band
while triphenylphosphite should not. Or UV : the spectrum of phenol should
shift to longer wavelength on addition of a drop of NaOH to the cell. The
triphenylphosphite spectrum should remain unchanged. Hydrolysis could be a
problem depending on the rate. TLC in nonaqueous solvents followed by
development in Iodine vapor which visualizes phenols well. good luck.
Professor Jim Sims
Department of Plant Pathology
University of California, Riverside
Riverside, CA 92521
Voice: 909 787 4127
FAX 909 787 4294
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