Molecular motions in solid saccharides studied by NMR spectroscopy

Analyses of spin-lattice relaxation time and second moment measurements of the polycrystalline saccharides methyl α-D-mannopyranoside, methyl β-D-arabinopyranoside, methyl β-L-arabinopyranoside and β-D-allose have revealed, apart from methyl group reorientations in the methyl pyranosides, the jump motion of a hydroxyl proton in a hydrogen bond in β-D-allose and trans-gauche reorientations of CH2OH groups in methyl α-D-mannopyranoside and β-D-allose.