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How do they know? Influencing the relative stereochemistry of the complex units of dinuclear triple-stranded
1Institut fur Organische Chemie, Universitat Karlsruhe, Germany. albrecht@ochhades.chemie.uni-karlsruhe.de
Abstract:
Dinuclear triple-stranded helicates or meso-helicates are formed by self-assembly of linear ligand strands with appropriate metal ions. Very often this self-assembly proceeds with high diastereoselectivity leading either to the helicate or the meso-helicate. The stereoselectivity of the self-assembly process can be influenced by different factors such as the rigidity of the ligand (-->helicate), the number of methylene units in the alkyl spacers (even number of CH2 units --> helicate; odd number --> meso-helicate), template effects, or chiral substituents.
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