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(6.14)
Since ionic liquids generally have much higher
viscosities, mass transport is quite slow, as
described before. This is a disadvantage for
electrosynthesis in ionic liquids. However, it
was found that cathodic reduction of
N
-methylphthalimide was promoted under
ultrasonication, resulting higher conversion
and current efficiency, as shown in
Eq. 6.15
[48]. This is due to facilitated mass transport of
the substrate under ultrasonication.
(6.15)
6.8.6.2 Electrochemical Fluorination
Poly(hydrogen fluoride) salts consisting of
amine and ammonium fluoride and hydrogen
fluoride (Et
3
N-
n
HF,
n
= 3-5; Et
4
NF-
n
HF,
n
=
3-5) are ionic liquids that have good
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