From: antonio regla (areglac$##$yahoo.com)
Date: Wed Mar 20 2002 - 16:49:37 EST
Dear List members:
A colleague of mine has asked me about the formation of the cyclohexylammonium salt of a phosphonic acid. She hydrolyzes the diethyl phosphonate to the acid with HCl, and then she adds cyclohexylamine, supposedly in excess, first to neutralize the HCl, and then to form the salt. All she's been able to isolate as a precipitate is the hydrochloride of cyclohexylamine. In the remaining product, she's detected cyclohexylamine. Can anyone suggest a good laboratory reference on how to carry out the preparation of an ammonium salt of a phosphonic acid? We would appreciate any help you may offer us.
Sincerely,
Antonio Regla
Facultad de Farmacia
Universidad Autonoma de Morelos, Cuernavaca, Mexico
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