VIBRATIONAL-SPECTRA AND STEREOCHEMISTRY OF MONOSACCHARIDES AND POLYSACCHARIDES .2. ALPHA-ANOMERS OF D-GLUCOSE AND D-GALACTOSE, GLUCITOL ANDGALACTITOL

The IR and Raman spectra of D-glucose and D-galactose a-anomers are co mpared with the corresponding spectra of the related polyatomic alcoho ls glucitol and galactitol. Experimental data on the frequencies and m odes of normal vibrations and on the contributions of normal vibration s involving particular skeletal CiOi and CiC(i+1) bonds to the potenti al energy distribution (PED) are compared with the results of theoreti cal calculations. The alpha-anomers of D-glucose and D-galactose with different configurations of the C4C4 and C4H4 bonds are characterized by substantially different sets of frequencies with prevailing contrib utions to PED from the CiOi and CiC(i+1) bonds. The similar bonds of g lucitol and galactitol are also characterized by specific frequency se ts. Particular CiOi and CiC(i+1) bonds have different numbers of ''loc alized'' frequencies.