The preparation and reactions of several new (eta(3)-allyl)molybdenum
complexes are described. Functionalization of a carbon-carbon double b
ond adjacent to the pi-allyl unit proceeds stereoselectively, and the
stereochemical outcome of this reaction is discussed in light of the C
urtin-Hammett principle. It is shown that carbonyl groups can also be
functionalized with moderate stereoselectivity, and this behavior is r
ationalized on the basis of conformational analysis using molecular me
chanics calculations.