CdH8(C2N3)4 crystallizes in the triclinic P1 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a distorted octahedral geometry to one N(1), one N(2), one N(23), one N(24), one N(7), and one N(8) atom. The Cd(1)-N(1) bond length is 2.77 Å. The Cd(1)-N(2) bond length is 2.77 Å. The Cd(1)-N(23) bond length is 2.35 Å. The Cd(1)-N(24) bond length is 2.35 Å. The Cd(1)-N(7) bond length is 2.26 Å. The Cd(1)-N(8) bond length is 2.26 Å. In the second Cd site, Cd(2) is bonded in a distorted octahedral geometry to one N(21), one N(22), one N(3), one N(4), one N(5), and one N(6) atom. The Cd(2)-N(21) bond length is 2.35 Å. The Cd(2)-N(22) bond length is 2.34 Å. The Cd(2)-N(3) bond length is 2.76 Å. The Cd(2)-N(4) bond length is 2.77 Å. The Cd(2)-N(5) bond length is 2.26 Å. The Cd(2)-N(6) bond length is 2.26 Å. There are fifteen inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(13), and one N(9) atom. The C(1)-N(1) bond length is 1.36 Å. The C(1)-N(13) bond length is 1.36 Å. The C(1)-N(9) bond length is 1.39 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one N(10), one N(14), and one N(2) atom. The C(2)-N(10) bond length is 1.40 Å. The C(2)-N(14) bond length is 1.36 Å. The C(2)-N(2) bond length is 1.36 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one N(11), one N(15), and one N(3) atom. The C(3)-N(11) bond length is 1.39 Å. The C(3)-N(15) bond length is 1.36 Å. The C(3)-N(3) bond length is 1.36 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one N(12), one N(16), and one N(4) atom. The C(4)-N(12) bond length is 1.39 Å. The C(4)-N(16) bond length is 1.36 Å. The C(4)-N(4) bond length is 1.36 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one N(1), one N(5), and one H(13) atom. The C(5)-N(1) bond length is 1.36 Å. The C(5)-N(5) bond length is 1.33 Å. The C(5)-H(13) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one N(2), one N(6), and one H(14) atom. The C(6)-N(2) bond length is 1.36 Å. The C(6)-N(6) bond length is 1.33 Å. The C(6)-H(14) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one N(3), one N(7), and one H(15) atom. The C(7)-N(3) bond length is 1.36 Å. The C(7)-N(7) bond length is 1.33 Å. The C(7)-H(15) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one N(4), one N(8), and one H(16) atom. The C(8)-N(4) bond length is 1.36 Å. The C(8)-N(8) bond length is 1.33 Å. The C(8)-H(16) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one N(13), one N(17), and one H(5) atom. The C(9)-N(13) bond length is 1.39 Å. The C(9)-N(17) bond length is 1.33 Å. The C(9)-H(5) bond length is 1.09 Å. In the tenth C site, C(10,11) is bonded in a trigonal planar geometry to one N(14), one N(18), and one H(6) atom. The C(10,11)-N(14) bond length is 1.39 Å. The C(10,11)-N(18) bond length is 1.33 Å. The C(10,11)-H(6) bond length is 1.09 Å. In the eleventh C site, C(12) is bonded in a trigonal planar geometry to one N(16); one N(20); and one H(7,8) atom. The C(12)-N(16) bond length is 1.39 Å. The C(12)-N(20) bond length is 1.33 Å. The C(12)-H(7,8) bond length is 1.09 Å. In the twelfth C site, C(13) is bonded in a trigonal planar geometry to one N(13), one N(21), and one H(9) atom. The C(13)-N(13) bond length is 1.39 Å. The C(13)-N(21) bond length is 1.34 Å. The C(13)-H(9) bond length is 1.08 Å. In the thirteenth C site, C(14) is bonded in a trigonal planar geometry to one N(14); one N(22); and one H(10,11,12) atom. The C(14)-N(14) bond length is 1.39 Å. The C(14)-N(22) bond length is 1.34 Å. The C(14)-H(10,11,12) bond length is 1.08 Å. In the fourteenth C site, C(15) is bonded in a trigonal planar geometry to one N(15); one N(23); and one H(10,11,12) atom. The C(15)-N(15) bond length is 1.39 Å. The C(15)-N(23) bond length is 1.34 Å. The C(15)-H(10,11,12) bond length is 1.08 Å. In the fifteenth C site, C(16) is bonded in a trigonal planar geometry to one N(16); one N(24); and one H(10,11,12) atom. The C(16)-N(16) bond length is 1.39 Å. The C(16)-N(24) bond length is 1.34 Å. The C(16)-H(10,11,12) bond length is 1.08 Å. There are twenty-four inequivalent N sites. In the first N site, N(1) is bonded in a water-like geometry to one Cd(1), one C(1), and one C(5) atom. In the second N site, N(2) is bonded in a water-like geometry to one Cd(1), one C(2), and one C(6) atom. In the third N site, N(3) is bonded in a distorted water-like geometry to one Cd(2), one C(3), and one C(7) atom. In the fourth N site, N(4) is bonded in a water-like geometry to one Cd(2), one C(4), and one C(8) atom. In the fifth N site, N(5) is bonded in a 3-coordinate geometry to one Cd(2), one C(5), and one N(9) atom. The N(5)-N(9) bond length is 1.40 Å. In the sixth N site, N(6) is bonded in a 3-coordinate geometry to one Cd(2), one C(6), and one N(10) atom. The N(6)-N(10) bond length is 1.40 Å. In the seventh N site, N(7) is bonded in a 3-coordinate geometry to one Cd(1), one C(7), and one N(11) atom. The N(7)-N(11) bond length is 1.40 Å. In the eighth N site, N(8) is bonded in a 3-coordinate geometry to one Cd(1), one C(8), and one N(12) atom. The N(8)-N(12) bond length is 1.40 Å. In the ninth N site, N(9) is bonded in a 1-coordinate geometry to one C(1), one N(5), and one H(1) atom. The N(9)-H(1) bond length is 1.03 Å. In the tenth N site, N(10) is bonded in a 1-coordinate geometry to one C(2); one N(6); and one H(2,3) atom. The N(10)-H(2,3) bond length is 1.03 Å. In the eleventh N site, N(11) is bonded in a 1-coordinate geometry to one C(3); one N(7); and one H(2,3) atom. The N(11)-H(2,3) bond length is 1.03 Å. In the twelfth N site, N(12) is bonded in a 1-coordinate geometry to one C(4), one N(8), and one H(4) atom. The N(12)-H(4) bond length is 1.03 Å. In the thirteenth N site, N(13) is bonded in a trigonal planar geometry to one C(1), one C(13), and one C(9) atom. In the fourteenth N site, N(14) is bonded in a trigonal planar geometry to one C(10,11); one C(14); and one C(2) atom. In the fifteenth N site, N(15) is bonded in a trigonal planar geometry to one C(10,11); one C(15); and one C(3) atom. The N(15)-C(10,11) bond length is 1.39 Å. In the sixteenth N site, N(16) is bonded in a trigonal planar geometry to one C(12), one C(16), and one C(4) atom. In the seventeenth N site, N(17) is bonded in a distorted water-like geometry to one C(9) and one N(21) atom. The N(17)-N(21) bond length is 1.36 Å. In the eighteenth N site, N(18) is bonded in a distorted water-like geometry to one C(10,11) and one N(22) atom. The N(18)-N(22) bond length is 1.36 Å. In the nineteenth N site, N(19) is bonded in a distorted water-like geometry to one C(10,11) and one N(23) atom. The N(19)-C(10,11) bond length is 1.33 Å. The N(19)-N(23) bond length is 1.36 Å. In the twentieth N site, N(20) is bonded in a distorted water-like geometry to one C(12) and one N(24) atom. The N(20)-N(24) bond length is 1.36 Å. In the twenty-first N site, N(21) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(13), and one N(17) atom. In the twenty-second N site, N(22) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(14), and one N(18) atom. In the twenty-third N site, N(23) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(15), and one N(19) atom. In the twenty-fourth N site, N(24) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(16), and one N(20) atom. There are twelve inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(9) atom. In the second H site, H(2,3) is bonded in a single-bond geometry to one N(10) atom. In the third H site, H(4) is bonded in a single-bond geometry to one N(12) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(10,11) atom. In the sixth H site, H(7,8) is bonded in a single-bond geometry to one C(10,11) atom. The H(7,8)-C(10,11) bond length is 1.09 Å. In the seventh H site, H(9) is bonded in a single-bond geometry to one C(13) atom. In the eighth H site, H(10,11,12) is bonded in a single-bond geometry to one C(14) atom. In the ninth H site, H(13) is bonded in a single-bond geometry to one C(5) atom. In the tenth H site, H(14) is bonded in a single-bond geometry to one C(6) atom. In the eleventh H site, H(15) is bonded in a single-bond geometry to one C(7) atom. In the twelfth H site, H(16) is bonded in a single-bond geometry to one C(8) atom. Linkers: 1 c1n[nH]c(-n2cnnc2)n1 ,3 C1=N[C](n2cnnc2)N[N]1. Metal clusters: 2 [Cd]. The MOF has largest included sphere 1.58 A, density 2.33 g/cm3, surface area 2991.73 m2/g, accessible volume 0.07 cm3/g