C2P4N2Se3 is Indium-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four 2,5,7-triselena-1,3,4,6-tetraphosphabicyclo[2.2.1]heptane-3,6-dicarbonitrile molecules. There are two inequivalent C sites. In the first C site, C(1) is bonded in a linear geometry to one P(3) and one N(2) atom. In the second C site, C(2) is bonded in a linear geometry to one P(1) and one N(1) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded in a 3-coordinate geometry to one C(2), one P(2), and one Se(2) atom. In the second P site, P(2) is bonded in a distorted trigonal non-coplanar geometry to one P(1), one Se(1), and one Se(3) atom. In the third P site, P(3) is bonded in a 3-coordinate geometry to one C(1), one P(4), and one Se(1) atom. In the fourth P site, P(4) is bonded in a distorted trigonal non-coplanar geometry to one P(3), one Se(2), and one Se(3) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded in a single-bond geometry to one C(2) atom. In the second N site, N(2) is bonded in a single-bond geometry to one C(1) atom. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a water-like geometry to one P(2) and one P(3) atom. In the second Se site, Se(2) is bonded in a water-like geometry to one P(1) and one P(4) atom. In the third Se site, Se(3) is bonded in a water-like geometry to one P(2) and one P(4) atom.
C2P4N2Se3 is Indium-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four 2,5,7-triselena-1,3,4,6-tetraphosphabicyclo[2.2.1]heptane-3,6-dicarbonitrile molecules. There are two inequivalent C sites. In the first C site, C(1) is bonded in a linear geometry to one P(3) and one N(2) atom. The C(1)-P(3) bond length is 1.79 Å. The C(1)-N(2) bond length is 1.17 Å. In the second C site, C(2) is bonded in a linear geometry to one P(1) and one N(1) atom. The C(2)-P(1) bond length is 1.79 Å. The C(2)-N(1) bond length is 1.17 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded in a 3-coordinate geometry to one C(2), one P(2), and one Se(2) atom. The P(1)-P(2) bond length is 2.22 Å. The P(1)-Se(2) bond length is 2.31 Å. In the second P site, P(2) is bonded in a distorted trigonal non-coplanar geometry to one P(1), one Se(1), and one Se(3) atom. The P(2)-Se(1) bond length is 2.29 Å. The P(2)-Se(3) bond length is 2.27 Å. In the third P site, P(3) is bonded in a 3-coordinate geometry to one C(1), one P(4), and one Se(1) atom. The P(3)-P(4) bond length is 2.22 Å. The P(3)-Se(1) bond length is 2.31 Å. In the fourth P site, P(4) is bonded in a distorted trigonal non-coplanar geometry to one P(3), one Se(2), and one Se(3) atom. The P(4)-Se(2) bond length is 2.29 Å. The P(4)-Se(3) bond length is 2.27 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a single-bond geometry to one C(2) atom. In the second N site, N(2) is bonded in a single-bond geometry to one C(1) atom. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a water-like geometry to one P(2) and one P(3) atom. In the second Se site, Se(2) is bonded in a water-like geometry to one P(1) and one P(4) atom. In the third Se site, Se(3) is bonded in a water-like geometry to one P(2) and one P(4) atom.