CdH21(C7N2)3 is Indium-like structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of eight CdH21(C7N2)3 clusters. Cd(1) is bonded in a distorted T-shaped geometry to one N(1), one N(2), and one N(6) atom. The Cd(1)-N(1) bond length is 2.27 Å. The Cd(1)-N(2) bond length is 2.32 Å. The Cd(1)-N(6) bond length is 2.39 Å. There are twenty-one inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(3), and one H(1) atom. The C(1)-N(1) bond length is 1.30 Å. The C(1)-N(3) bond length is 1.33 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(18), one C(6), and one C(7) atom. The C(2)-C(18) bond length is 1.36 Å. The C(2)-C(6) bond length is 1.41 Å. The C(2)-C(7) bond length is 1.49 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one N(2), one N(4), and one H(2) atom. The C(3)-N(2) bond length is 1.33 Å. The C(3)-N(4) bond length is 1.34 Å. The C(3)-H(2) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(8) and one H(3) atom. The C(4)-C(8) bond length is 1.36 Å. The C(4)-H(3) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(8) and one H(4) atom. The C(5)-C(8) bond length is 1.39 Å. The C(5)-H(4) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(2) and one H(5) atom. The C(6)-H(5) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a 3-coordinate geometry to one C(2); one N(3); and two equivalent H(6,7) atoms. The C(7)-N(3) bond length is 1.47 Å. Both C(7)-H(6,7) bond lengths are 0.97 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(11), one C(4), and one C(5) atom. The C(8)-C(11) bond length is 1.51 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(10), one N(2), and one H(8) atom. The C(9)-C(10) bond length is 1.34 Å. The C(9)-N(2) bond length is 1.38 Å. The C(9)-H(8) bond length is 0.93 Å. In the tenth C site, C(10) is bonded in a 3-coordinate geometry to one C(9), one N(4), and one H(9) atom. The C(10)-N(4) bond length is 1.35 Å. The C(10)-H(9) bond length is 0.93 Å. In the eleventh C site, C(11) is bonded in a 3-coordinate geometry to one C(8); one N(4); and two equivalent H(10,11) atoms. The C(11)-N(4) bond length is 1.47 Å. Both C(11)-H(10,11) bond lengths are 0.97 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(13), one N(1), and one H(12) atom. The C(12)-C(13) bond length is 1.33 Å. The C(12)-N(1) bond length is 1.36 Å. The C(12)-H(12) bond length is 0.93 Å. In the thirteenth C site, C(13) is bonded in a 3-coordinate geometry to one C(12), one N(3), and one H(13) atom. The C(13)-N(3) bond length is 1.37 Å. The C(13)-H(13) bond length is 0.93 Å. In the fourteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(15) and one H(14) atom. The C(14)-C(15) bond length is 1.35 Å. The C(14)-H(14) bond length is 0.93 Å. In the fifteenth C site, C(15) is bonded in a trigonal planar geometry to one C(14), one C(16), and one C(17) atom. The C(15)-C(16) bond length is 1.52 Å. The C(15)-C(17) bond length is 1.39 Å. In the sixteenth C site, C(16) is bonded in a 3-coordinate geometry to one C(15); one N(5); and two equivalent H(15,16) atoms. The C(16)-N(5) bond length is 1.47 Å. Both C(16)-H(15,16) bond lengths are 0.97 Å. In the seventeenth C site, C(17) is bonded in a distorted single-bond geometry to one C(15) and one H(17) atom. The C(17)-H(17) bond length is 0.93 Å. In the eighteenth C site, C(18) is bonded in a distorted single-bond geometry to one C(2) and one H(18) atom. The C(18)-H(18) bond length is 0.93 Å. In the nineteenth C site, C(19) is bonded in a distorted bent 120 degrees geometry to one N(5) and one H(19) atom. The C(19)-N(5) bond length is 1.38 Å. The C(19)-H(19) bond length is 0.93 Å. In the twentieth C site, C(20) is bonded in a distorted bent 120 degrees geometry to one N(6) and one H(20) atom. The C(20)-N(6) bond length is 1.37 Å. The C(20)-H(20) bond length is 0.93 Å. In the twenty-first C site, C(21) is bonded in a trigonal planar geometry to one N(5), one N(6), and one H(21) atom. The C(21)-N(5) bond length is 1.35 Å. The C(21)-N(6) bond length is 1.31 Å. The C(21)-H(21) bond length is 0.93 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(1), and one C(12) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(3), and one C(9) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one C(1), one C(13), and one C(7) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one C(10), one C(11), and one C(3) atom. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one C(16), one C(19), and one C(21) atom. In the sixth N site, N(6) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(20), and one C(21) atom. There are eighteen inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the sixth H site, H(6,7) is bonded in a single-bond geometry to one C(7) atom. In the seventh H site, H(8) is bonded in a single-bond geometry to one C(9) atom. In the eighth H site, H(9) is bonded in a single-bond geometry to one C(10) atom. In the ninth H site, H(10,11) is bonded in a single-bond geometry to one C(11) atom. In the tenth H site, H(12) is bonded in a single-bond geometry to one C(12) atom. In the eleventh H site, H(13) is bonded in a single-bond geometry to one C(13) atom. In the twelfth H site, H(14) is bonded in a single-bond geometry to one C(14) atom. In the thirteenth H site, H(15,16) is bonded in a single-bond geometry to one C(16) atom. In the fourteenth H site, H(17) is bonded in a single-bond geometry to one C(17) atom. In the fifteenth H site, H(18) is bonded in a single-bond geometry to one C(18) atom. In the sixteenth H site, H(19) is bonded in a single-bond geometry to one C(19) atom. In the seventeenth H site, H(20) is bonded in a single-bond geometry to one C(20) atom. In the eighteenth H site, H(21) is bonded in a single-bond geometry to one C(21) atom. Linkers: 12 c1cn(Cc2ccc(Cn3ccnc3)cc2)cn1. Metal clusters: 8 [Cd]. The MOF has largest included sphere 6.73 A, density 0.94 g/cm3, surface area 5059.50 m2/g, accessible volume 0.62 cm3/g