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The crystalline form of 1-deoxy-D-tagatose, C6H12O5, is shown to be 1-deoxy-![[alpha]](/logos/entities/alpha_rmgif.gif)
-D-tagatopyranose; the absolute configuration is determined by use of D-lyxono-1,4-lactone as the starting material. The title compound crystallized as concomitant polymorphs from a mixture of ethyl actate and methanol. Although the melting points of the materials differ by 7 K, the molecular conformations are almost identical and, in both polymorphs, each molecule is subject to four O-H
O hydrogen bonds.
-D-tagatopyranose; the absolute configuration is determined by use of D-lyxono-1,4-lactone as the starting material. The title compound crystallized as concomitant polymorphs from a mixture of ethyl actate and methanol. Although the melting points of the materials differ by 7 K, the molecular conformations are almost identical and, in both polymorphs, each molecule is subject to four O-HO hydrogen bonds.metal-organic compounds
Poly[1,4,8,11-tetraazacyclotetradecane(2+) [hepta-μ-sulfido-trisulfidohexaantimony(III)]], {(C10H26N4)[Sb6S10]}n, was synthesized solvothermally using the macrocyclic tetramine 1,4,8,11-tetraazacyclotetradecane (cyclam) as the structure-directing agent. The structure consists of novel [Sb6S10]2− layers containing Sb2S2, Sb4S4 and Sb7S7 hetero-rings, which are separated by macrocyclic amine molecules. The macrocylic amine molecules are disordered over two crystallographically distinct positions and are diprotonated in order to balance the charge of the anionic layers.
