Materials Data on CrH10C2(NO4)2 by Materials Project
CrC2H4O7NH2H2NH2O crystallizes in the monoclinic P2_1/c space group. The structure is one-dimensional and consists of four ammonia molecules; four hydrogen molecules; four hydroxylamine molecules; and two CrC2H4O7 ribbons oriented in the (0, 0, 1) direction. In each CrC2H4O7 ribbon, Cr4+ is bonded in a distorted trigonal bipyramidal geometry to five O2- atoms. There are a spread of Cr–O bond distances ranging from 2.05–2.28 Å. There are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.23–1.44 Å. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.21–1.48 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the third H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.67 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cr4+ and one C4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one C4+ and one H1+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr4+ and one C4+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Cr4+, one C4+, and one H1+ 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 water-like geometry to one Cr4+ and two H1+ atoms. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to one Cr4+, one C4+, and one H1+ atom.