Capturing the Silver

capturing the silver
The structure shows the complex formation of a marine natural product (westiellamide or also named cycloxazoline, isolated from an ascidian from the great barrier reef in Australia) with four silver cations. A very unusual feature of this sandwich complex is that the four cations are held as a triangle with a central silver ion in a plane inbetween the two macrocyclic natural products. The charge repulsion is compensated by strong binding interaction with the cycloxazoline molecules.

Wipf, P.; Venkatraman, S.; Miller, C. P.; Geib, S. J., "Metal-complexes of marine peptide metabolites - a novel Ag4 cluster." Angew. Chem. Int. Ed. Engl. 1994, 33, 1516.

This art illustrates some of the research of Prof. Peter Wipf's group at the University of Pittsburgh.

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