SET Flashcards
1
Q
how to avoid direct photochemistry
A
use wavelength that doesn’t affect starting materials
2
Q
good sacrificial e- donors
A
amines
3
Q
equivalents in trifluoromethylations
A
1 eg substrate
1.5 eg CF3 source
2 eg sacrificial e- donor
4
Q
reactions for mechanistic understanding
A
radical trapping, screen potential sacrificial e- donors, recover photocatalyst for analysis/reuse and Stern-Volmer analysis
5
Q
radical trapping expts
A
TEMPO traps radicals, use internal standard and NMR to determine % radicals produced
6
Q
Stern-volmer analysis
A
looks at quenching fluorescence, can assess interaction of excited state PC with each reactant in mixture, see if sacrificial e- donor is needed
