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13C Magnetic Resonance Spectroscopic Evidence for Formation of Borate Complexes of Polyhydroxy Compounds,
NATIONAL RESEARCH COUNCIL OF CANADA SASKATOON (SASKATCHEWAN) PRAIRIE REGIONAL LAB
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Borate complexes, formed on addition of sodium tetraborate to solutions of carbohydrates in D2O, can be detected by monitoring changes in the 13C magnetic resonance spectra of the parent compounds. In one type of change the chemical shifts remain constant, but broadening of signals of 13C atoms in the vicinity of the complex occurs. In the other type, the signals remain sharp, but changes in chemical shift take place. In addition to permitting the detection of borate complexing, it is often possible to ascertain the chemical structures present and to determine quantatively the relative proportions of complexes and starting materials. A wide variety of polyhydroxy compounds was examined. Modified author abstract
APPROVED FOR PUBLIC RELEASE