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.
Allyltransfer von Metall zu Metall: Anhand der ersten strukturell charakterisierten Rh(η1‐allyl)‐Komplexe wird gezeigt, dass der σ‐gebundene Allylsubstituent von einem RhIII‐ auf einen RhI‐Komplex im schnellen Gleichgewicht übertragen werden kann. Dies könnte die Abnahme der Regioselektivität in Rh‐katalysierten allylischen Alkylierungen erklären, für die Komplex 1 ein aktiver Katalysator ist.
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