Assembling Quasi-enantiomeric Octahedral Complexes of Different Metals via Quasi-racemate Crystallization

Yanay Popowski, Israel Goldberg*, Moshe Kol

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Aiming at a general methodology for binary co-assembly of complexes of different metals through quasiracemate crystallization, the hexadentate ligand 1 comprised of the chiral bipyrrolidine core and two bipyridine peripheral arms is introduced. Ligand 1 was found to bind in a fully diastereoselective and uniform mode around ZnII, FeII and CdII giving coordinatively inert octahedral "chiral-at-metal" complexes with the Δ4Λ24Δ2 wrapping mode. Equimolar mixtures of quasienantiomeric pairs of these complexes exhibited a clear tendency to pack as quasiracemates as was revealed from the crystallographic structures of [(R,R)-1-Zn](PF6)2/[(S,S)-1-Fe](PF6)2 and [(R,R)-1-Zn](PF6)2/[(S,S)-1-Cd](PF6)2, in an isomorphous fashion to that of the racemic compound [rac-1-Zn](PF6)2 in space group C2/c.

Original languageEnglish
Pages (from-to)5530-5533
Number of pages4
JournalChemistry - A European Journal
Volume22
Issue number16
DOIs
StatePublished - 11 Apr 2016

Keywords

  • binary materials
  • bipyrrolidine
  • chiral ligands
  • hexadentate ligands
  • quasiracemate

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