Magic angle Raman optical activity: β-pinene and nopinone

Hecht, L. and Barron, L.D. (1989) Magic angle Raman optical activity: β-pinene and nopinone. Spectrochimica Acta Part A: Molecular Spectroscopy, 45(6), pp. 671-674. (doi: 10.1016/0584-8539(89)80176-X)

Abstract

Applying the Stokes—Mueller formalism to the case of right angle scattering of chiral molecules randomly oriented in an optically isotropic phase, orientations of the polarization analyzer in the scattered beam at the ‘magic angle’ of ∼ ±35.26° to the vertical have been identified to isolate the pure magnetic dipole contribution to the ROA intensity. Magic angle ROA spectra of(−) β-pinene and (+) nopinone from 350 to 1350 cm−1 are presented as first examples. Comparing the magic angle ROA spectra of both terpenes with their corresponding depolarized spectra, the origin of the couplet at 716 and 765 cm−1 in the magic angle ROA spectrum of β-pinene is ascribed to interactions between deformations and torsions of the olefinic group with a skeletal mode of the pinane structure.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Hecht, Dr Lutz and Barron, Professor Laurence
• Authors: Hecht, L., and Barron, L.D.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Spectrochimica Acta Part A: Molecular Spectroscopy
• Publisher: Pergamon Press plc
• ISSN: 0584-8539