Materials Data on CaH6C2(NO)4 by Materials Project
CaC2H6(NO)4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ca2+ is bonded to two N2- and five O2- atoms to form edge-sharing CaN2O5 pentagonal bipyramids. There are one shorter (2.54 Å) and one longer (2.61 Å) Ca–N bond lengths. There are a spread of Ca–O bond distances ranging from 2.29–2.51 Å. There are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a trigonal planar geometry to one N2- and two O2- atoms. The C–N bond length is 1.38 Å. There is one shorter (1.27 Å) and one longer (1.29 Å) C–O bond length. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to one N2- and two O2- atoms. The C–N bond length is 1.39 Å. There is one shorter (1.27 Å) and one longer (1.29 Å) C–O bond length. There are four inequivalent N2- sites. In the first N2- site, N2- is bonded in a 2-coordinate geometry to one C4+ and one H1+ atom. The N–H bond length is 1.03 Å. In the second N2- site, N2- is bonded in a water-like geometry to one Ca2+ and two H1+ atoms. There is one shorter (1.02 Å) and one longer (1.03 Å) N–H bond length. In the third N2- site, N2- is bonded in a 2-coordinate geometry to one C4+ and one H1+ atom. The N–H bond length is 1.02 Å. In the fourth N2- site, N2- is bonded in a distorted water-like geometry to one Ca2+ and two H1+ atoms. There is one shorter (1.02 Å) and one longer (1.03 Å) N–H bond length. There are six inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Ca2+ and one C4+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ca2+ and one C4+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ca2+ and one C4+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ca2+ and one C4+ atom.