Cyclobishelicenes: Shape-Persistent Figure-Eight Aromatic Molecules with Promising Chiroptical Properties
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Article de revue
Este ítem está publicado en
Chemistry (Weinheim an der Bergstrasse, Germany). 2019, vol. 25, n° 63, p. 14364-14369
Resumen en inglés
Cyclobis[n]helicenes (n=3 or 5) are chiral D2 -symmetric pi-conjugated macrocycles with stable lemniscular, or figure-eight, shapes. The conformational analysis of five different cyclobis[n]helicenes revealed that these ...Leer más >
Cyclobis[n]helicenes (n=3 or 5) are chiral D2 -symmetric pi-conjugated macrocycles with stable lemniscular, or figure-eight, shapes. The conformational analysis of five different cyclobis[n]helicenes revealed that these molecules can only exist as their lemniscular conformers with high barriers to enantiomerization (>200 kJmol-1 ). The enantiomers of a cyclobis[5]helicene were resolved by HPLC and their unusual chiroptical properties were attributed to the inherent chirality of their macrocyclic figure-eight.< Leer menos
Palabras clave en inglés
aromatic compounds
chirality
chiroptical properties
conformation analysis
helical structures
Centros de investigación