Chiral cleft" formation

We will show that metal coordination, both in mono- and dinucleating ligand systems can enforce chiral cleft formation. A sununary of approaches towards 02-binding and activation, catalytic oxygenations and self-assembly of dinuclear and chiral oxidation catalysts is presented. 

Chiral cleft -formation can be enforced by the introduction of additional coordinating ligands 72 as is schematically shown in figure 11. In a second approach "fences" are assembled, close to a catalytically active metal site (structure 73), in a C2-symmetric arrangement. 

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