Hg7(P2Br3)2 crystallizes in the monoclinic P2_1/c space group. There are four inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a linear geometry to two equivalent P(1) atoms. In the second Hg site, Hg(2) is bonded in a 3-coordinate geometry to one P(1), one P(2), and one Br(2) atom. In the third Hg site, Hg(3) is bonded in a 4-coordinate geometry to two equivalent P(2), one Br(2), and one Br(3) atom. In the fourth Hg site, Hg(4) is bonded in a rectangular see-saw-like geometry to one P(1), one Br(1), one Br(2), and one Br(3) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded to one Hg(1), one Hg(2), one Hg(4), and one P(2) atom to form corner-sharing PHg3P tetrahedra. In the second P site, P(2) is bonded to one Hg(2), two equivalent Hg(3), and one P(1) atom to form corner-sharing PHg3P tetrahedra. There are three inequivalent Br sites. In the first Br site, Br(1) is bonded in a single-bond geometry to one Hg(4) atom. In the second Br site, Br(2) is bonded in a 3-coordinate geometry to one Hg(2), one Hg(3), and one Hg(4) atom. In the third Br site, Br(3) is bonded in a water-like geometry to one Hg(3) and one Hg(4) atom.
Hg7(P2Br3)2 crystallizes in the monoclinic P2_1/c space group. There are four inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a linear geometry to two equivalent P(1) atoms. Both Hg(1)-P(1) bond lengths are 2.49 Å. In the second Hg site, Hg(2) is bonded in a 3-coordinate geometry to one P(1), one P(2), and one Br(2) atom. The Hg(2)-P(1) bond length is 2.51 Å. The Hg(2)-P(2) bond length is 2.50 Å. The Hg(2)-Br(2) bond length is 3.18 Å. In the third Hg site, Hg(3) is bonded in a 4-coordinate geometry to two equivalent P(2), one Br(2), and one Br(3) atom. There is one shorter (2.47 Å) and one longer (2.48 Å) Hg(3)-P(2) bond length. The Hg(3)-Br(2) bond length is 3.13 Å. The Hg(3)-Br(3) bond length is 2.99 Å. In the fourth Hg site, Hg(4) is bonded in a rectangular see-saw-like geometry to one P(1), one Br(1), one Br(2), and one Br(3) atom. The Hg(4)-P(1) bond length is 2.48 Å. The Hg(4)-Br(1) bond length is 2.63 Å. The Hg(4)-Br(2) bond length is 3.02 Å. The Hg(4)-Br(3) bond length is 2.79 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one Hg(1), one Hg(2), one Hg(4), and one P(2) atom to form corner-sharing PHg3P tetrahedra. The P(1)-P(2) bond length is 2.21 Å. In the second P site, P(2) is bonded to one Hg(2), two equivalent Hg(3), and one P(1) atom to form corner-sharing PHg3P tetrahedra. There are three inequivalent Br sites. In the first Br site, Br(1) is bonded in a single-bond geometry to one Hg(4) atom. In the second Br site, Br(2) is bonded in a 3-coordinate geometry to one Hg(2), one Hg(3), and one Hg(4) atom. In the third Br site, Br(3) is bonded in a water-like geometry to one Hg(3) and one Hg(4) atom.