Chemistry Reference
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Figure 8.3 Accessibility of the polar functional group is highly dependent on
environment polarity.
tetrakis(triphenylphosphine)palladium. After ball milling the polymer
supported tetrakis(triphenylphosphine)palladium in the presence of excess
triphenylphosphine, 1,4-diphenylbuta-1,3-diyne was formed as the major
product (Scheme 8.5). This demonstrates the ability of the polymer sup-
ported catalyst under ball milling conditions to give rise to two different
products where two completely different catalysts are needed in solution.
Polymer supported catalysts have been known to be recyclable since you
can easily recover the solid support by filtration. The authors found under
mechanochemical conditions the polymer supported catalyst can be re-
cycled but observed diminished yields after each run, citing that the
palladium leaches out of the polymer over time.
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