CLVIII.—The constitution and rotatory powers of mannitol and fructose complexes formed in solutions containing boric acid and sodium hydroxide

George Van Barneveld Gilmour
1922 Journal of the Chemical Society Transactions  
VERY little is known about the constitution of the complexes formed by the combination of polyhydric alcohols and sugars with boric acid or borax. Mannitoboric acid, for instance, is held to be produced by the condensation of two hydroxyl groups of one mannitol molecule with one molecule of boric acid, forming a ring containing two atoms of oxygen. Whether the reacting hydroxyl groups are adjacent or not is a question that has yet to be satisfactorily settled. Boeseken has stated (Rec. truv.
more » ... ated (Rec. truv. chim., 1915, 34, 96) that such compounds have the common cyclic group The average rate of increase in rotation per 0.06 gram of sodium hydroxide is 0.14" in experiments 2-7, and 0.24" in experiments 7-9. The equivalent of alkali is present in experiment 9.
doi:10.1039/ct9222101333 fatcat:yamaz3225jdonfom5u7ccjy24i