title: A study of planar chromophores in dichromophoric molecules by circular dichroism spectroscopy.
abstract: A synthesis of a series of enantiomerically pure polycyclic structures derived from (+)-(1S,5S)-bicyclo[3.3.1]nonane-2,6-dione was accomplished. Molecules containing single or two similar or different chromophores were obtained. Chiroptical properties of the synthesized chiral structures 2-5, and 7 having carbonyl, 1,2-methylenedioxybenzene, and indole chromophores were studied. The sign of the cotton effect was related to sector rules and the orientation of the planes containing chromophores in dichromophoric molecules possessing 1,2-methylenedioxybenzene and carbonyl or indole chromophores. Interaction of the chromophores in dichromophoric molecules was examined by CD spectroscopy; however, no direct evidence was obtained.
authors.affiliation: Department of Organic Chemistry, Vilnius University, Vilnius, Lithuania.
authors.forename: Sigitas
authors.initials: S
authors.lastname: Stoncius
authors.forename: Gintautas
authors.initials: G
authors.lastname: Bagdziūnas
authors.forename: Jule
authors.initials: J
authors.lastname: Malinauskiene
authors.forename: Eugenijus
authors.initials: E
authors.lastname: Butkus