Preparation of copper(I) pseudo-rotaxanes from bis-phosphine ligands

Meera Mohankumar, Michel Holler, Jean François Nierengarten, Jean Pierre Sauvage

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24 Scopus citations


The preparation of heteroleptic Cu complexes from various 2,9-disubstituted-1,10-phenanthrolines (phen) and different bis-phosphine (PP) ligands was investigated. These heteroleptic complexes are found to be stable in CH 2Cl 2 solutions and no detectable ligand exchange reactions could be detected. The results also show that the CuI-mediated threading of all the bis-phosphine ligands through the macrocycle is effective. The X-ray crystal structure analysis of BF 4 proves the threading of the POP moiety through the macrocyclic phenanthroline ligand. The intramolecular face-to-face p p interaction between one phenyl ring of the POP ligand and the phenanthroline moiety induces a significant rocking of the POP ligand. The results also show that formation of the homoleptic bisphenanthroline Cu complex is prevented by the macrocyclic nature of the phenanthroline ligand.

Original languageEnglish
Pages (from-to)12192-12195
Number of pages4
JournalChemistry - A European Journal
Issue number39
StatePublished - 24 Sep 2012
Externally publishedYes


  • copper
  • macrocyclic ligands
  • phenanthroline
  • phosphine ligands
  • rotaxane


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