Catenanes doubly-linked

This strategy has been further extended to the synthesis of a triply twisted tris[bis(phenanthroline)copper(I)] complex analogous to (35) which, after correct linking of the termini and demetalation, leads to a doubly interlocked catenane structure [46]. 

The intent of metal coordination is to provide both a robust tanplate platform and a large diversity of stereochonical geometries defined by the coordination properties of the metal. In addition to tetrahedral and octahedral coordination geometries obtained, for example, with Cu(I) or Zn(II), respectively, linear arrangements can be obtained using Au(I) centers coordinated to alkyne- and phosphine-terminated strands to prepare different types of catenates. 2 Square planar coordination around Pd(II) was also used to generate a doubly interlocked [2]catenane, known as a Solomon link. ... 

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