| Summary: | 碩士 === 國立中央大學 === 化學工程學系 === 84 === In this project, we intend to investigate:(I). the
solubilities/miscibilites of typical phase transfer catalysts
of quaternary ammonium salts in insert solvents of dipole
moment 0-4 debyes;(II). The determination of the association
constants of the quaternary ammonium cations with various
common anions by conductometry; and (III). the partition
coefficient and the extration constantsof the quaternary
ammonium ion pairs in systems of various organic/aqueous
phases. From the above experimental results, we can thoroughly
understand the effectsof the structures and sizes of the
quaternary ammonium cations and their counterions and the
effects of the solvent properties (electric constant , dipole
moment,solubility parameter) on the association , pratition
and extration of the quaternary ammonium ion pairs. Thus
we may find out their quantitativecorrelations. These are
the fundamental studies for understanding various phenomena in
phase transfer catalysis, and are useful for selecting
proper solvents as main as main constituents in the organic
phase.
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