5. Experimental section
(R)-(þ)-limonene was purchased from Aldrich (>99.0% purity).
5.1. IR and VCD spectroscopy
The VCD measurements were done with a VERTEX 80 FT-IR
spectrometer equipped with a PMA 50 photoeleastic modulator
and MCT-Detector (D313/B-A) (Bruker Optics). The VCD spectra
were recorded with a 2-h data collection time at 4 cm1 resolution
using a cell with BaF2 windows. Spectra were measured at 22 C as
a neat solution with a path length of 0.1 mm.