| Summary: | An Ag(I) metallacycle obtained unexpectedly during the preparation of Pd(II) complexes of the bifunctional ligand 5-([2,2′-bipyridin]-5-yl)pyrimidine-2-amine (<b>L</b>) has been characterized using X-ray structure determination as a binuclear, metallacyclic species [Ag<sub>2</sub><b>L</b><sub>2</sub>](SbF<sub>6</sub>)<sub>2</sub>, where both the bipyridine and pyrimidine-N donors of <b>L</b> are involved in coordination to the metal. The full coordination environment of the Ag(I) defines a case of highly irregular 4-coordination. In the crystal, the Ag-metallacycles assemble into one-dimensional supramolecular metalladynamers linked together by hydrogen-bonding interactions.
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