CoC18H18(NO)4(C5H2)2 is Indium-derived structured and crystallizes in the monoclinic P2/c space group. The structure is zero-dimensional and consists of two C5H2 clusters and two CoC18H18(NO)4 clusters. In each C5H2 cluster, there are five inequivalent C sites. In the first C site, C(5) is bonded in a 4-coordinate geometry to one C(13), one C(14), one C(8), and one C(9) atom. The C(5)-C(13) bond length is 1.55 Å. The C(5)-C(14) bond length is 1.56 Å. The C(5)-C(8) bond length is 1.38 Å. The C(5)-C(9) bond length is 1.40 Å. In the second C site, C(8) is bonded in a distorted single-bond geometry to one C(5) and one H(6) atom. The C(8)-H(6) bond length is 0.93 Å. In the third C site, C(9) is bonded in a single-bond geometry to one C(5) and one H(7) atom. The C(9)-H(7) bond length is 0.93 Å. In the fourth C site, C(13) is bonded in a 3-coordinate geometry to one C(5) and two equivalent C(14) atoms. There is one shorter (0.93 Å) and one longer (0.97 Å) C(13)-C(14) bond length. In the fifth C site, C(14) is bonded in a 2-coordinate geometry to one C(5) and two equivalent C(13) atoms. There are two inequivalent H sites. In the first H site, H(6) is bonded in a single-bond geometry to one C(8) atom. In the second H site, H(7) is bonded in a single-bond geometry to one C(9) atom. In each CoC18H18(NO)4 cluster, Co(1) is bonded in a distorted octahedral geometry to two equivalent N(1), two equivalent O(1), and two equivalent O(2) atoms. Both Co(1)-N(1) bond lengths are 2.03 Å. Both Co(1)-O(1) bond lengths are 2.21 Å. Both Co(1)-O(2) bond lengths are 2.24 Å. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(6) atom. The C(1)-C(2) bond length is 1.37 Å. The C(1)-C(4) bond length is 1.37 Å. The C(1)-C(6) bond length is 1.52 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(1) atom. The C(2)-H(1) bond length is 0.93 Å. In the third C site, C(3) is bonded in a water-like geometry to one C(11) and two equivalent H(2,3) atoms. The C(3)-C(11) bond length is 1.46 Å. Both C(3)-H(2,3) bond lengths are 0.97 Å. In the fourth C site, C(4) is bonded in a single-bond geometry to one C(1) and one H(4) atom. The C(4)-H(4) bond length is 0.93 Å. In the fifth C site, C(6) is bonded in a bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(6)-O(1) bond length is 1.19 Å. The C(6)-O(2) bond length is 1.19 Å. In the sixth C site, C(7) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(5) atom. The C(7)-N(1) bond length is 1.31 Å. The C(7)-N(2) bond length is 1.35 Å. The C(7)-H(5) bond length is 0.93 Å. In the seventh C site, C(10) is bonded in a distorted trigonal planar geometry to one C(12), one N(2), and one H(8) atom. The C(10)-C(12) bond length is 1.33 Å. The C(10)-N(2) bond length is 1.32 Å. The C(10)-H(8) bond length is 0.93 Å. In the eighth C site, C(11) is bonded in a 4-coordinate geometry to one C(3); one N(2); and two equivalent H(9,10) atoms. The C(11)-N(2) bond length is 1.45 Å. Both C(11)-H(9,10) bond lengths are 0.97 Å. In the ninth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(10), one N(1), and one H(11) atom. The C(12)-N(1) bond length is 1.37 Å. The C(12)-H(11) bond length is 0.93 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Co(1), one C(12), and one C(7) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(10), one C(11), and one C(7) atom. There are seven inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2,3) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(7) atom. In the fifth H site, H(8) is bonded in a single-bond geometry to one C(10) atom. In the sixth H site, H(9,10) is bonded in a single-bond geometry to one C(11) atom. In the seventh H site, H(11) is bonded in a single-bond geometry to one C(12) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted L-shaped geometry to one Co(1) and one C(6) atom. In the second O site, O(2) is bonded in a distorted L-shaped geometry to one Co(1) and one C(6) atom. Linkers: 3 c1cn(CCCCn2ccnc2)cn1 ,1 [O]C(=O)c1cc[c]cc1.[O]C(=O)c1ccc([C]2[C]3[C][C]32)cc1 ,1 [O]C(=O)c1ccc([C]2[C]3[C][C@@]32c2ccc(C([O])=O)cc2)cc1. Metal clusters: 2 [C]1O[Co]2(O1)O[C]O2. The MOF has largest included sphere 5.14 A, density 1.24 g/cm3, surface area 4859.40 m2/g, accessible volume 0.30 cm3/g