First X-ray structure analyses of rhodium(III) eta1-allyl complexes and a mechanism for allylic isomerization reactions.
Metal-to-metal allyl transfer: Using the first structurally characterized rhodium eta(1)-allyl complexes it is shown that the sigma-bound allyl substituent can be transferred from the Rh(III) complex to a Rh(I) complex in a fast equilibrium. This process may account for the decrease in regioselectivity observed in allylic alkylation reactions in which complex 1 is used as a catalyst.
Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, INF 270, 69120 Heidelberg, Germany.
Barbara
B
Wucher
Michael
M
Moser
Stephanie A
SA
Schumacher
Frank
F
Rominger
Doris
D
Kunz