Abstract
Reaction of dirhodium(II) tetracarboxylates [Rh 2(O 2CR) 4] with 1,4,8,11-tetra-azacyclotetradecane cyclam, L 1 under ambient conditions leads to the formation of the stable adducts [Rh 2O 2CR 4(cyclam)] n. Under similar conditions reaction of dirhodium(II) tetracarboxylates with the tridentate macrocycles 1,4,7-triazacyclononane (L 3), N, N′, N″- trimethyl-1,4,7-triazacyclononane (L 4) and 1,4,7-trithiacyclononane (L 5) gives adducts of 3:2 stoichiometry [{Rh 2(O 2CR) 4} 3(L) 2] n . The stoichiometries of these polymeric adducts illustrate the exo manner in which the macrocyclic ligands bind to the binuclear metal substrates.
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