16 research outputs found
5-[2,4-Dihydroxy-5-(5-hydroxy-2,4,6-trioxo-3,5-dihydro-1H-pyrimidin-5-yl)-3-methoxyphenyl]-5-hydroxy-3,5-dihydro-1H-pyrimidine-2,4,6-trione pentahydrate
The title compound, C15H12N4O11·5H2O, has a `propeller-like' structure. The two alloxan units have screw-boat conformations. Their mean planes are normal to the central aromatic ring with dihedral angles of 87.91â
(7) and 88.27â
(7)°, and they are inclined to one another by 40.86â
(7)°. In the crystal, molecules are linked via OâH...O and NâH...O hydrogen bonds, forming a three-dimensional framework. There are also CâH...O hydrogen bonds present within the framework