Stereodirection by chiral molecules adsorbed on Pt(111) was studied by observing the stereospecific binding of prochiral molecules at individual chiral sites.  By combining DFT calculations and STM imaging it was possible to define both the regiochemistry and the stereochemistry of the binding interactions. We present STM measurements of the interaction of two representative prochiral molecules with two chiral molecules. A hierarchy of metal-molecule and molecule-molecule interactions are found to control the stereochemistry of modifier-substrate complexation. These include chemisorption into specific adsorption geometries, conventional H-bonding, CH�OC bonding and steric repulsion. Control of the binding configurations was explored by tuning the structure of the chiral molecule. These studies provide information and insight on heterogeneous asymmetric hydrogenation reactions on metal surfaces.

Combined non-covalent and hemisorption driven prochiral steering of alpha-ketoesters at sites formed by chiral molecules on Pt(111)

245th National Meeting (2013)

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