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HgCl2N2 crystallizes in the orthorhombic Cmmm space group. The structure is one-dimensional and consists of four ammonia molecules and two HgCl2 ribbons oriented in the (0, 0, 1) direction. In each HgCl2 ribbon, Hg2+ is bonded in a distorted square co-planar geometry to four equivalent Cl1- atoms. All Hg–Cl bond lengths are 2.61 Å. Cl1- is bonded in an L-shaped geometry to two equivalent Hg2+ atoms.
Hg2C(NCl)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded to six Cl1- atoms to form distorted HgCl6 octahedra that share corners with four equivalent HgCl6 octahedra and edges with four equivalent HgN2Cl4 octahedra. The corner-sharing octahedral tilt angles are 7°. There are a spread of Hg–Cl bond distances ranging from 2.38–3.17 Å. In the second Hg2+ site, Hg2+ is bonded in a 2-coordinate geometry to two N3- and one Cl1- atom. There are one shorter (2.09 Å) and one longer (2.13 Å) Hg–N bond lengths. The Hg–Cl bond length is 2.99 Å. In the third Hg2+ site, Hg2+ is bonded to two equivalent N3- and four equivalent Cl1- atoms to form distorted HgN2Cl4 octahedra that share corners with four equivalent HgN2Cl4 octahedra and edges with four equivalent HgCl6 octahedra. The corner-sharing octahedral tilt angles are 6°. Both Hg–N bond lengths are 2.12 Å. There are two shorter (3.01 Å) and two longer (3.22 Å) Hg–Cl bond lengths. C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.21 Å) and one longer (1.26 Å) C–N bond length. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a trigonal planar geometry to two Hg2+ and one C4+ atom. In the second N3- site, N3- is bonded in a bent 120 degrees geometry to one Hg2+ and one C4+ atom. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded to five Hg2+ atoms to form a mixture of distorted corner and edge-sharing ClHg5 trigonal bipyramids. In the second Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one Hg2+ atom.
HgC2(NCl)2(CH3)2(CH3NH2)2 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of eight methane molecules, eight methylammonium molecules, and four HgC2(NCl)2 clusters. In each HgC2(NCl)2 cluster, Hg2+ is bonded in a 4-coordinate geometry to two equivalent C+0.67- and two equivalent Cl1- atoms. Both Hg–C bond lengths are 2.06 Å. Both Hg–Cl bond lengths are 2.95 Å. C+0.67- is bonded in a distorted linear geometry to one Hg2+ and one N3- atom. The C–N bond length is 1.17 Å. N3- is bonded in a single-bond geometry to one C+0.67- atom. Cl1- is bonded in a 2-coordinate geometry to one Hg2+ atom.
Pt(NCl)2(HgCl2)3 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four cis-diaminedichloroplatinum molecules and twelve mercuric chloride molecules.
HgC2H8S2(NCl)4 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four HgC2H8S2(NCl)4 clusters. Hg2+ is bonded in a 4-coordinate geometry to four Cl1- atoms. There are a spread of Hg–Cl bond distances ranging from 2.43–2.82 Å. There are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a distorted trigonal planar geometry to two N+2.50- and one S2- atom. Both C–N bond lengths are 1.32 Å. The C–S bond length is 1.79 Å. In the second C4+ site, C4+ is bonded in a distorted trigonal planar geometry to two N+2.50- and one S2- atom. Both C–N bond lengths are 1.32 Å. The C–S bond length is 1.77 Å. There are four inequivalent N+2.50- sites. In the first N+2.50- site, N+2.50- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. There is one shorter (1.02 Å) and one longer (1.03 Å) N–H bond length. In the second N+2.50- site, N+2.50- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. There is one shorter (1.02 Å) and one longer (1.03 Å) N–H bond length. In the third N+2.50- site, N+2.50- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.03 Å. In the fourth N+2.50- site, N+2.50- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. There is one shorter (1.02 Å) and one longer (1.03 Å) N–H bond length. There are eight inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N+2.50- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N+2.50- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N+2.50- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N+2.50- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N+2.50- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N+2.50- atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one N+2.50- atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one N+2.50- atom. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a 1-coordinate geometry to one C4+, one S2-, and one Cl1- atom. The S–S bond length is 2.03 Å. The S–Cl bond length is 3.35 Å. In the second S2- site, S2- is bonded in a 2-coordinate geometry to one C4+ and one S2- atom. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one Hg2+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Hg2+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Hg2+ atom. In the fourth Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one Hg2+ and one S2- atom.