Title
Chiral superstructures from homochiral Zn2+, Co2+, Fe2+‐2,6‐bis (aryl ethylimine)pyridine complexes
Author
Florina Dumitru, Arie van der Lee, Mihail Barboiu
Year
2019
Journal
Chirality
Abstract
We report the hierarchical supramolecular organization of metallosupramolecular homochiral complexes 1‐Λ‐(S,S,S,S)‐M2+/1‐∆‐(R,R,R,R)‐M2+ and 2‐ Λ‐(S,S,S,S)‐M2+/2‐∆‐ (R,R,R,R)‐M2+ of M2+ = Co2+, Fe2+, Zn2+ metal ions with chiral pseudo‐terpyridine‐type ligands: 1‐(S,S) or 1‐(R,R) = 2,6‐bis (naphthyl ethylimine)pyridine and 2‐(S,S) or 2‐(R,R) = 2,6‐bis (phenyl‐ethylimine)pyridine. Circular dichroism measurements in solution were used to confirm the enantiomeric nature of all twelve complexes. For crystal structures of 1‐ Λ‐ (S,S,S,S)‐M2+ or 1‐∆‐ (R,R,R,R)‐M2+ complexes, absolute configurations {∆ (or P), Λ (or M)} were confirmed by refinement of the Flack parameter x: −0.007 ≤ x ≤ 0.11 for the single crystals of 1‐Λ‐(S,S,S,S)‐M2+/1‐∆‐ (R,R,R,R)‐M2+, 2‐ Λ‐ (S,S,S,S)‐Fe2+, and 2‐∆‐ (R,R,R,R)‐Co2+.
Instrument
J-810
Keywords
Circular dichroism, Stereochemistry, Materials