Abstract
Two molecular spacers which cofacially dispose terpyridyl-palladium(II)-acetonitrile units separated by ∼ 7 Å are described. The spacers are polyaromatic molecules, one spacer is fully aromatic whereas the other has two symmetrically disposed reduced aromatic rings. Addition of the linker, 4,4′-dipyridyl, to solutions of these spacer-chelator complexes leads to the rapid and quantitative formation of supramolecular rectangles. It is found that the reduced rectangle forms a 4 : 1 adduct with 9-methylanthracene whereas the oxidized rectangle forms a 5 : 1 adduct with 9-methylanthracene. The possible reasons for this high level of agglomeration and the difference in adduct formation for the two systems are discussed.
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