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 Δ4Λ2/Λ4Δ2 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 language | English |
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Pages (from-to) | 5530-5533 |
Number of pages | 4 |
Journal | Chemistry - A European Journal |
Volume | 22 |
Issue number | 16 |
DOIs | |
State | Published - 11 Apr 2016 |
Keywords
- binary materials
- bipyrrolidine
- chiral ligands
- hexadentate ligands
- quasiracemate