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The synthesis and characterization of hexametallic host molecules is described. The new molecules utilize 2,2′-bipyrimidine to bridge rhenium(I) tricarbonyls at three points along the short edge of the cavity, and triply functional pyridine-based ligands (2,4,6-tripyridyl-1,3,5-triazine or 1,3,5-tris(4-ethynylpyridyl)benzene) as a top and bottom. Modeling has been done to determine the volumes of the cavities and the sizes of the entry ports for the host molecules.
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