Comparison of the Photocatalytic Behavior of Phosphinated Polymer-Anchored Iron Carbonyl Species and Homogeneous Phosphine Substituted Iron Carbonyl Species: Alkene Isomerization and Reaction with Trialkylsilanes.
Interim technical rept.,
ALABAMA UNIV UNIVERSITY DEPT OF CHEMISTRY
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A styrene-1 divinylbenzene resin whose phenyl rings have been derivatized with --PPh2 groups serves as an anchor for FeCOnn 3,4 groups the anchor is the Fe-P bond. The photocatalytic activity of suspensions of the polymer-anchored FeCOn has been compared to homogeneous solutions of FeCOnPPh35-nn 5,4,3. 1-Pentene isomerization and reaction with HSiEt3 can be effected with each system. Observed quantum yields for 1-pentene isomerization exceed unity for each catalyst precursor and the initial trans- to cis-2-pentene ratio depends on the catalyst precursor implicating the retention of the triarylphospine groups in the actual catalytically active species. Irradiation of FeCOnPPh35-nn 4 results in loss of CO, not PPh3, suggesting a photoinert anchor to the FeCOn groups in the polymer systems. These experiments establish the viability of photogenerating catalysts anchored to polymer supports without destruction of the the anchor bond in the photogeneration procedure. Author
- Organic Chemistry
- Physical Chemistry