DOE OSTI2020
Cu(C2O4)2CuC4(NO6)2N2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two ammonia molecules, one copper;oxalic acid molecule, and one CuC4(NO6)2 cluster. In the CuC4(NO6)2 cluster, Cu2+ is bonded in a distorted octahedral geometry to six O2- atoms. There are a spread of Cu–O bond distances ranging from 1.89–2.63 Å. There are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.17 Å) and one longer (1.18 Å) C–O bond length. In the second C4+ site, C4+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.17 Å) and one longer (1.18 Å) C–O bond length. N1+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.20 Å) and one longer (1.28 Å) N–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one N1+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C4+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu2+ and one N1+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one Cu2+ and one C4+ atom. In the fifth O2- site, O2- is bonded in a single-bond geometry to one C4+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to one Cu2+ and one C4+ atom.