Analysis of the unusually large rotatory strength of (+)-(1S,5S)-bicyclo[3.2.0]heptan-3-one
Abstract
The unusually large rotatory strength recently reported for the n→π* transition of (+)-(1S,5S)-bicyclo-[3.2.0]heptan-3-one is found to arise primarily from the twist of the cyclopentanone unit, as shown by a CNDO/S molecular orbital model.