Chiroptical properties of 10,11-dihydro-5,10-methano-5H-dibenzo(a,d)cycloheptene derivatives.

スポンサーリンク

概要

• 論文の詳細を見る

• The titled compounds have been prepared from (+)-(9<I>R</I>,10<I>R</I>)-dimethyl 11-oxo-9,10-dihydro-9,10-ethanoanthracene-1,5-dicarboxylate. Their absolute configurations were determined by chemical reaction, and by IR and CD spectra. Although the CD spectra of <B>2</B> and <B>3</B> (R=NH<SUB>2</SUB>) were expected to show an antipodal pattern from analysis of the simple coupling mechanism, they showed approximately the same magnitude of the positive Cotton effect in both regions of the <SUP>1</SUP>L<SUB>b</SUB> and <SUP>1</SUP>L<SUB>a</SUB> benzenoid transitions. Their CD spectra were calculated by the point-dipole exciton treatment and by the π-SCF approximation using the dipole velocity procedure with and without the charge transfer transition between the aromatic chromophores. Thus, the electric transition dipole moment should not be treated as a point dipole at any place and the rotational strength should be calculated by the dipole velocity procedure since a local magnetic transition dipole moment was produced perpendicular to the benzene ring in the region of the <SUP>1</SUP>L<SUB>b</SUB> transition. The charge transfer transition can not be neglected in the calculation of the MO, though it does not cause the alteration of the sequence of the coupling mode.

• 公益社団法人 日本化学会の論文

著者

• Hagishita Sanji

  Shionogi Research Laboratories Shionogi And Co. Itd.

• Kuriyama Kaoru

  Shionogi Research Laboratories, Shionogi & Co. Ltd.

関連論文

• Crystal Structure of Human Secretory Phospholipase A_2-IIA Complex with the Potent Indolizine Inhibitor 120-1032^1
• Chiroptical properties of 10,11-dihydro-5,10-methano-5H-dibenzo(a,d)cycloheptene derivatives.
• Confirmation of the sector rule of the benzenoid chromophore.
• Optical Activity of Bis-1,1′-spiroindanes. I. Optical Resolution and Absolute Configuration
• Optical Activity of Bis-1,1′-spiroindanes. II. Absolute Configuration of Optically Active 5,5′- and 6,6′-Disubstituted-bis-1,1′-spiroindanes and Their Circular Dichroism Spectra

スポンサーリンク