Photoactivated Isomerization of Linear Olefins^,

Abstract

The photocatalyzed (350 nm) isomerization of linear olefins catalyzed by platinum(II) bis(acetylacetonato) [Pt(acac)(2)] in the presence of silanes was studied. Catalytic activity depends on the silane. Triphenylsilane is the most reactive silane studied, with more than 98% isomerization of the alkene occurring after 20-min irradiation. There is no concomitant hydrosilylation. The mechanism has been investigated and a metal hydride addition-elimination mechanism proposed.

Isomerization of Allylbenzenes

“…Application of photochemistry for the isomerization of allylbenzenes has been rather sporadic, even though the method has been used to achieve olefin isomerization . It should be noted that certain transition metal catalyst systems, specifically those containing iron ,, and cobalt, , have been used with photoirradiation.…”