CO-loss and geometric isomerization in the frozen matrix photochemistry of cis-Fe(CO)(4)X-2, where X = Br and I, cis-[Et4N][Mn(CO)(4)Br-2], cis-Mn(CO)(4)(PBu3)Br, and Mn(CO)(3)(PBu3)(2)Br

摘要

Photolysis of cis-Fe(CO)(4)X-2, where X = Br and I, results in low energy, facile rearrangement to the trans isomer with no evidence of CO-loss. In contrast, the isoelectronic cis-Mn(CO)(4)Br-2 anion exhibits CO-loss upon photolysis with only weak evidence for the trans isomer. The photolysis of Mn(CO)(5)Br, Mn(CO)(4)Br(PBu3) and Mn(CO)(3)Br(PBu3)(2) have also been examined in frozen matrices. (C) 2007 Elsevier B.V. All rights reserved.