Optical rotatory dispersion

The optical rotatory dispersion (ORD ), and optical rotatory dispersion curve, is a physico-chemical analysis method for optically active chemical substances. Measured thereby, the specific rotation [ α ] (or the molar optical rotation of [ Φ ] ) in dependence on the wavelength λ of the linearly polarized light, so the size of:

  • Has investigated the optically active substance has an absorption maximum in the wavelength range investigated, the ORD- curve is due to the Cotton effect " abnormal "
  • However, has examined the optically active substance no absorption maximum in the investigated wavelength range, as is referred to the curve as " simple " (English plain).
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