Abstract
As demonstrated in this paper, exciton Cotton effects reflecting the absolute stereochemistry of the molecule can result from coupling between the allowed transitions of phthalimide. 3,6-dichlorophthalimide, 4,5-dichlorophthalimide or 3,4,5,6-tetrachlorophthalimide and p-substituted benzene, naphthalene, benzoate or cinnamate chromophores. This significantly extends the scope of application of phthalimide chromophoric derivatives to stereochemical assignments by CD spectroscopy. The direction of the transition moments in chlorinated phthalimide chromophores are determined from linear dichroism measurements of N-butyl derivatives oriented in polyethylene film.
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