Yoko Kobayashi, T. Igarashi, Hiroaki Takahashi
Nov 1, 1976
Citations
0
Influential Citations
27
Citations
Journal
Journal of Molecular Structure
Abstract
Abstract 1,3-Dihydroxyacetone was found to crystallize in five different crystal forms, four of which consist of dimers, and the fifth consists of monomers. Infrared and Raman data indicate that dimeric 1,3-dihydroxyacetone has the centrosymmetric structure 2,5-dihydroxymethyl-2, 5-dihydroxy-1,4-dioxane in all the four crystal forms of the dimer, and crystalline DL-glyceraldehyde has the centrosymmetric structure 2,5-dihydroxymethyl-3,6-dihydroxy-l,4-dioxane. D(+)-glyceraldehyde, a viscous liquid at room temperature, was found to be a mixture of the monomers and asymmetric dimers having five-membered and/or six-membered ring structures. In the melted state, both 1,3-dihydroxyacetone and DL-glyceraldehyde exist as mixtures of monomeric and dimeric molecules. Partial assignments of the IR and Raman bands are also made.