(E)-pent-2-ene

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Addition of 1 atm. ethylene to a photostationary state mixture of IIa,b (1.4:1 a:b at 25°, toluene solution, see Example E) followed by continued photolysis at 25° resulted in slow production of free pentene, primarily trans-2-pentene. Less than 0.1 equiv pentene was evolved after 1 hour irradiation. Pentene formation did not occur thermally at 25°. The isomeric distribution, as measured after 15 and 60 min photolysis, was 85% trans-2-pentene, 10-12% cis-2-pentene, and 3-5% 1-pentene. to a photostationary state mixture of IIa,b (1.4:1 a:b at 25° followed by continued photolysis at 25°

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Addition of 1 atm. ethylene to a photostationary state mixture of IIa,b (1.4:1 a:b at 25°, toluene solution, see Example E) followed by continued photolysis at 25° resulted in slow production of free pentene, primarily trans-2-pentene. Less than 0.1 equiv pentene was evolved after 1 hour irradiation. Pentene formation did not occur thermally at 25°. The isomeric distribution, as measured after 15 and 60 min photolysis, was 85% trans-2-pentene, 10-12% cis-2-pentene, and 3-5% 1-pentene. to a photostationary state mixture of IIa,b (1.4:1 a:b at 25° followed by continued photolysis at 25°