Cellobiose spectroscopy

The constants for H-bridging complex formation between D-glucose, cellobiose, xylose, and phenol as models for cellulose and different 0-basic dipolar molecules such as N-methyl-caprolactam HMPA, and DMSO in chloroform and ethanol have been determined. Evidence of hydrogen bonding in D-fructose as shown in (28) has been obtained from variable temperature high field n.m.r. spectroscopy. The preponderance of the -furanose form in DMSO is attributed to this feature. The kinetics of the tautomeric equilibria were studied. 

Diphenyl-3,3 -diboronic acid 41 forms T.l complexes with cellobiose, maltose and lactose (but not sucrose), giving exiton coupling in c.d. spectroscopy owing to the immobilisation of the two phenyl rings of 41 in a chiral form. " 2... 

All H-, C-, and N-n.m.r. resonance signals of methyl -D-glucopyranoside tetranitrate and -cellobiose octanitrate have been unambiguously assigned by use of C- H- and N-0-C H-shift correlation spectroscopy. Based on these data and on selective decoupling experiments, the N resonance signals of cellulose trinitrate were tentatively assigned. ... 

The following disaccharides and derivatives have been subjected to conformational analysis by n.m.r spectroscopy and/or computational methods cellobiose in aqueous solution, methyl P-xylobioside, methyl P-cellobioside, P-gentibiose, all possible monomethyl ethers of methyl p-lactoside, unsaturated, sulfated disaccharides, such as IS, obtained by cleavage of glycosaminoglycans with lyases, ° chondroitin sulfate-related ctmqmunds, such as 16, the uronic... 

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