X-RAY AND NMR-STUDY OF THE STRUCTURE OF THE ORGANOTIN CARBOHYDRATE - YLIDENE-6-(TRIPHENYLSTANNYL)-ALPHA-D-GLUCOFURANOSE

The crystal and molecular structure of the title compound has been det ermined by X-ray crystallography, H-1 NMR and C-13 NMR spectroscopy. I n the crystals of the chiral carbohydrate the hydroxyl groups are held together by intramolecular H bonding, and there is an intermolecular link between one hydroxyl hydrogen atom and an oxygen of the isopropyl idene ring. The tin atom is in a tetrahedral environment and the short est Sn...O separation is 3.354(5) Angstrom, an interaction that appear s to have no effect on the stereochemistry of the metal. The H-1 NMR s pectrum shows long-range splitting of a methylene proton by a hydroxyl hydrogen.