Asymmetric transfer hydrogenation of allylic alcohols with ruthenium complexes is a novel reaction. We have been able to convert geraniol to citronellol with an in situ catalytic system [RuCODCl₂]_n and chiral bidentate ligands in 95% yield and 90% ee. The mechanism of this reaction has been investigated with deuterated IPA. We have evidence that the allylic alcohol isomerizes to the enol, which subsequently undergoes hydrogenation. The results of the isomerization reactions, the deuterated experiments, and the use of a known catalyst {Diacetato[(S)-(-)-2,2'-bis(di-p-tolylphosphino)-1,1'-binaphthyl]ruthenium(II)} will be presented.