Cyclobishelicenes: Shape‐Persistent Figure‐Eight Aromatic Molecules with Promising Chiroptical Properties
Year: 2019
Type: article
Abstract: Cyclobis[ n ]helicenes ( n =3 or 5) are chiral D 2 ‐symmetric π‐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 kJ mol −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.
Source: Chemistry - A European Journal
Institutions: Centre National de la Recherche Scientifique, Centre de recherche Paul Pascal, Aix-Marseille Université, Centrale Méditerranée, Institut des Sciences Moléculaires de Marseille, Université Paris-Sud, Institut de Chimie Moléculaire et des Matériaux d'Orsay, Chimie et Biologie des Membranes et des Nanoobjects, Institut Polytechnique de Bordeaux
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2967755686