Cyclic [2]pseudorotaxane tetramers consisting of two rigid rods threaded through two bis-macrocycles:
Julien Frey1, Christian Tock, Jean-Paul Collin
1Laboratoire de Chimie Ogano-Minerale, LC3 UMR 7177 du CNRS, Universite Louis Pasteur, Institut de Chimie, 4 rue Blaise Pascal, 67070 Strasbourg Cedex, France.
Abstract:
Variously substituted coordinating rigid rods have been synthesized which incorporate a central 4,7-phenanthroline nucleus attached to two 2-pyridyl groups via its 3 and 8 positions, so as to yield bis-bidentate chelates, the two-coordinating axes of the chelates being parallel to one another. Regardless of the nature of the substituents borne by the rods, the copper(I)-induced threading reaction of two such rods through the rings of two bis-macrocycles affords in a quantitative yield the 4-copper(I) threaded assembly. The [2]pseudorotaxane tetramers thus obtained have been fully characterized in solution and, for one of them, an X-ray structure could be obtained, confirming the threaded nature of the complex and providing important structural information.
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