Materials Data on H2SeNO4 by Materials Project
H6Se3(NO5)2NO2 crystallizes in the monoclinic C2 space group. The structure is zero-dimensional and consists of two nitrous acid molecules and two H6Se3(NO5)2 clusters. In each H6Se3(NO5)2 cluster, N is bonded in a distorted trigonal planar geometry to two H and one O atom. There is one shorter (1.04 Å) and one longer (1.73 Å) N–H bond length. The N–O bond length is 1.33 Å. There are three inequivalent H sites. In the first H site, H is bonded in a distorted single-bond geometry to one N and one O atom. The H–O bond length is 1.02 Å. In the second H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the third H site, H is bonded in a single-bond geometry to one N atom. There are two inequivalent Se sites. In the first Se site, Se is bonded in a tetrahedral geometry to four O atoms. There is two shorter (1.63 Å) and two longer (1.78 Å) Se–O bond length. In the second Se site, Se is bonded in a distorted trigonal non-coplanar geometry to three O atoms. There are a spread of Se–O bond distances ranging from 1.62–1.98 Å. There are five inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Se atom. In the second O site, O is bonded in a water-like geometry to one H and one Se atom. In the third O site, O is bonded in a single-bond geometry to one Se atom. In the fourth O site, O is bonded in a water-like geometry to one H and one Se atom. In the fifth O site, O is bonded in a bent 120 degrees geometry to one N and one Se atom.