Ungewöhnlich hohe Rotationsbarrieren am tetraedrischen Kohlenstoffatom

Durch Rotation um CC-Einfachbindungen in geeignet substituierten Verbindungen kommen Rotationsisomere (auch Rotamere genannt) zustande, die sich getrennt isolieren lassen, wenn die Rotationsbarriere hoch genug ist. In diesem Aufsatz werden Triptycen- und Fluoren-Derivate besprochen, deren Rotationsbarrieren um 30 kcal/mol liegen.

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