INFRARED AND RAMAN-SPECTROSCOPY APPLIED TO CONFORMATIONAL EQUILIBRIA - METHODS AND RECENT RESULTS

Common methods for conformational studies by vibrational spectroscopy include identification of band intensities by crystallization at low t emperatures, intensity Variations at Variable temperatures and dissolu tion in solvents of different polarity. In addition, matrix isolation studies, crystallization under high pressure, formation of clathrates, temperature studies in liquid noble gases and chemometric methods can be applied. These methods will be briefly discussed and are applied t o some halomethyl dimethyl halosilanes which are presently being studi ed. The temperature dependent conformational equilibrium in chlorocycl ohexane has been tested by chemometrics. (C) 1997 Elsevier Science B.V .