Materials Data on H2C3O4 by Materials Project
C3H2O4 crystallizes in the tetragonal P4_1 space group. The structure is zero-dimensional and consists of four 1,3-dioxolane-4,5-dione molecules. there are two inequivalent C2+ sites. In the first C2+ site, C2+ is bonded in a tetrahedral geometry to two equivalent H1+ and two equivalent O2- atoms. Both C–H bond lengths are 1.10 Å. Both C–O bond lengths are 1.44 Å. In the second C2+ site, C2+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.21 Å) and one longer (1.35 Å) C–O bond length. H1+ is bonded in a single-bond geometry to one C2+ atom. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a water-like geometry to two C2+ atoms. In the second O2- site, O2- is bonded in a single-bond geometry to one C2+ atom.