Reference

A neutron diffraction study of the crystal structure of b-D-fructopyranose

A neutron diffraction study of the crystal structure of b-D-fructopyranose. Takagi, Shozo; Jeffrey, G. A. (Chem. Dep., Brookhaven Natl. Lab., Upton, N. Y., USA). Acta Crystallogr., Sect. B, B33(11), 3510-15 (English) 1977. CODEN: ACBCAR. DOCUMENT TYPE: Journal CA Section: 75 (Crystallization and Crystal Structure) Section cross-reference(s): 6, 23 b-D-Fructopyranose, C6H12O6, crystallizes in space group P212121, with a 9.191(2), b 10.046(2), and c 8.095(2) ?; Z = 4. The neutron diffraction refinement was based on an earlier x-ray study by R. Rosenstein (1968). The H-bonding consists of an infinite chain with a single-link side chain. Two of the H bonds involve an unusual asym. bifurcated interaction, the weak component of which is to the ring O. Although this mol. is a b-ketopyranose, the C-O hemi-acetal bond lengths and valence angles are characteristic of an a-D-aldopyranose or Me a-D-pyranoside mol.

Purification of sugar solutions containing boric acid

Purification of sugar solutions containing boric acid. Takasaki, Yoshiyuki (Agency of Industrial Sciences and Technology, Japan). Japan. JP 52009740 B4 18 Mar 1977 Showa, 4 pp. (Japanese). (Japan). CODEN: JAXXAD. CLASS: IC: C13K001-00. APPLICATION: JP 71-43466 17 Jun 1971. DOCUMENT TYPE: Patent CA Section: 44 (Industrial Carbohydrates) Sodium borate or H3BO3 was sepd. from solns. of fruit sugar (I) [7660-25-5] and grape sugar (II) [50-99-7] or from a soln. of D-xylulose [551-84-8] by passing the solns. through a Dowex 1X8 (an anion exchanger) (III) [12627-85-9] column. Thus, a 4 mL soln. contg. I 1.86, II 0.3, and H3BO3 0.12 g was charged to a III column and eluted with water to sep. H3BO3.