Materials Data on HgC2(SN)2 by Materials Project
Hg(SCN)2 crystallizes in the triclinic P1 space group. The structure is two-dimensional and consists of one Hg(SCN)2 sheet oriented in the (0, 0, 1) direction. Hg2+ is bonded to four N3- and two S2- atoms to form edge-sharing HgS2N4 octahedra. There are three shorter (2.84 Å) and one longer (2.86 Å) Hg–N bond lengths. Both Hg–S bond lengths are 2.45 Å. There are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a distorted linear geometry to one N3- and one S2- atom. The C–N bond length is 1.18 Å. The C–S bond length is 1.65 Å. In the second C4+ site, C4+ is bonded in a distorted linear geometry to one N3- and one S2- atom. The C–N bond length is 1.18 Å. The C–S bond length is 1.65 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted single-bond geometry to two equivalent Hg2+ and one C4+ atom. In the second N3- site, N3- is bonded in a distorted single-bond geometry to two equivalent Hg2+ and one C4+ atom. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a water-like geometry to one Hg2+ and one C4+ atom. In the second S2- site, S2- is bonded in a water-like geometry to one Hg2+ and one C4+ atom.