Abstract
AbstractCD spectra of flexible organic molecules in solution are normally very sensitive to conformation. In a system composed of two or more chromophores joined by one or more single bonds and with one fixed or strongly preferred conformation, it is often possible to reproduce the CD spectrum by semiempirical calculations based on interactions between the electronic transitions in the respective chromophores. In a system containing two or more conformations of appreciable weight, the observed CD spectrum is the superposition of those of the individual conformations and has to be analyzed in terms of the individual calculated spectra and the relative energies of the respective conformations. The effect of temperature variation on conformational equilibria and on the composite CD spectra will be discussed and exemplified. © 1995 Wiley‐Liss, Inc.
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