CdC7N4H4Cl crystallizes in the triclinic P-1 space group. Cd(1) is bonded to one N(1), one N(2), one N(3), one N(4), and two equivalent Cl(1) atoms to form edge-sharing CdN4Cl2 octahedra. The Cd(1)-N(1) bond length is 2.47 Å. The Cd(1)-N(2) bond length is 2.48 Å. The Cd(1)-N(3) bond length is 2.38 Å. The Cd(1)-N(4) bond length is 2.36 Å. There is one shorter (2.64 Å) and one longer (2.67 Å) Cd(1)-Cl(1) bond length. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(1), one N(1), and one N(2) atom. The C(1)-C(1) bond length is 1.44 Å. The C(1)-N(1) bond length is 1.35 Å. The C(1)-N(2) bond length is 1.34 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(3), one N(1), and one N(3) atom. The C(2)-C(3) bond length is 1.46 Å. The C(2)-N(1) bond length is 1.36 Å. The C(2)-N(3) bond length is 1.35 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(7) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-C(7) bond length is 1.40 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(3), one N(4), and one H(1) atom. The C(4)-N(4) bond length is 1.34 Å. The C(4)-H(1) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(6), one N(4), and one H(2) atom. The C(5)-C(6) bond length is 1.39 Å. The C(5)-N(4) bond length is 1.35 Å. The C(5)-H(2) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(5) and one H(3) atom. The C(6)-H(3) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(3) and one H(4) atom. The C(7)-H(4) bond length is 1.09 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a distorted water-like geometry to one Cd(1), one C(1), and one C(2) atom. In the second N site, N(2) is bonded in a distorted single-bond geometry to one Cd(1), one C(1), and one N(3) atom. The N(2)-N(3) bond length is 1.37 Å. In the third N site, N(3) is bonded in a 3-coordinate geometry to one Cd(1), one C(2), and one N(2) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Cd(1), one C(4), and one C(5) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(7) atom. Cl(1) is bonded in an L-shaped geometry to two equivalent Cd(1) atoms. Linkers: 1 c1ccc(cn1)C1=[N]=C(N=N1)C1=[N]=C(N=N1)c1cccnc1 ,1 [CH]/C=C(/C1=[N]=C(N=N1)C1=[N]=C(N=N1)c1cccnc1)\[C] ,2 c1ccc(cn1)C1=[N]=C(N=N1)C1=N[C]=N[N]1 ,1 [CH]=C[C](C1=[N]=C(N=N1)C1=[N]=C(N=N1)c1cccnc1)[C]. Metal clusters: 2 [Cd]. The MOF has largest included sphere 1.50 A, density 2.52 g/cm3, surface area 2866.03 m2/g, accessible volume 0.06 cm3/g