Derivatives, proton spin-lattice relaxation rates

K. Bock, L. D. Hall, and C. Pedersen, Survey of the proton spin-lattice relaxation rates of selected furanose derivatives, Can. J. Chem., 58 (1980) 1923-1928. 

The first observations on the stereochemical dependence of spin-lattice relaxation-rates of carbohydrate molecules, beginning in " 1972, provided a general survey of the nonselective relaxation-rates of the anomeric protons of monosaccharide derivatives, oligosaccharides, and some polysaccharides. 

Nonselective Spin-Lattice Relaxation Rates (s ) for the Anomeric Protons of Monosaccharides and Derivatives"... 

Figure 26.16 The temperature dependence ofthe jump rates ry for deuterium in TaViDos and TaVjDu, as determined from the spin lattice relaxation data [72], The solid lines show the fits of Eq. (26.29) to the data. The dashed line represents the behavior of Ty (l) for H in TaVjHo jj, as derived from the fit of Eq. (26.29) to the proton spin-lattice relaxation data (Ref [54]).

I want to spend the remaining part of my presentation drawing attention to a second important application of the pulse Fourier transform technique - namely the measurement of the spin-lattice relaxation rates (Rl-values) of the proton and l c nuclei of carbohydrate derivatives in general, and of sucrochemicals in particular - which is the fourth of the five n.m.r. parameters listed in Table I. 

Spin-lattice relaxation rates and n.O.e. or protons of exo- and endo-diastereoisomers of 1,2-0-(1-methoxyethylidene) and 1,2-0-(l-benzyloxyethylidene) derivatives of 3,4,6-tri-0-acetyl-y8-D-manno-pyranose and some specifically deuterated analogues have been used to... 

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