(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (2), 1972) Hackett, Peter A.; Phillips, David
Quantum yields of S1→ T1 intersystem crossing in 1,3-dichloro-tetrafluoroacetone have been measured using the technique of biacetyl sensitization. The vibrationally-relaxed singlet state of the molecule intersystem crosses to a dissociative triplet with quantum yield 0.92. Vibrationally-excited singlet-state molecules do not intersystem cross, but may dissociate in two ways.