The recent proof that the trimethylene cyclic acetals of D-mannitol and D-sorbitol mer in structure, the former being 1, 3: 2, 5: 4, 6-trimethylene-D-mannitol'and the latter 1, 3: 2, 4: 5, 6- trimethylene-D-sorbitol, 2 indicates clearly the great influence of configuration on the type of acetal that is favored. It is the purpose of the present article to discuss the structures of the methylene and benzylidene cyclic acetals of the polyhydroxy alcohols upon the basis of ...
