Re: ORGLIST: PTC solubilities needed

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From: Jacob Zabicky (zabicky$##$
Date: Fri Feb 04 2005 - 10:07:33 EST

Hello Jacobo,

As the solute and the solvents are inexpensive and not too difficult to =

handle, it seems that this is a case where one may experimentally
determine the distribution coefficient of BTEA between water and the
solvent by various possible methods: gravimetry of the residue after
solvent evaporation, directly or after redissolving and precipitating a =

tetraphenylborate (possibly even a perchlorate) salt, UV and IR
spectrophotometry, refractive index, direct or reverse phase
chromatographic methods such as TLC with spot diameter measurement (for =

example iodine vapor uptake or fluorescence quenching spots), HPLC
with UVD or differential refractive index etc. Some easy calibration
would be required in all cases.

All the best,


Prof. Jacob Zabicky
Institutes for Applied Researcfh
Ben-Gurion University of the Negev
P. O. Box 653
Beer-Sheva, 84105
Tel. +972-8-6461271
Fax. +972-8-6472969
Private: P. O. Box 12366
Beer-Sheva, 84863
Tel. +972-8-6496792

On Feb 4, 2005, at 15:13, Jacobo Cruces wrote:

> Dear all,
> I have tried a search through Internet, but without success. Can
> anybody tell me about a source for phase transfer catalysts (PTC)
> solubilities? More specifically I'm looking for BTEAC
> (benzyltriethylammonium chloride) solubility in dichloromethane and
> chloroform. The Fluka catalog has very useful data on
> tetrabutylammonium salts but nothing about BTEAC.
> Best regards,
> Dr. Jacobo Cruces
> Research Manager
> GalChimia, S.L.
> Cebreiro, s/n O Pino
> 15823 A Coruņa
> Phone: +34 981 814 506
> Fax: +34 981 814 507
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