CoC6N5H4O2CH2CH3 crystallizes in the tetragonal I4_1/a space group. The structure consists of sixteen 02329_fluka molecules and sixteen 02329_fluka molecules inside a CoC6N5H4O2 framework. In the CoC6N5H4O2 framework, Co(1) is bonded in a square pyramidal geometry to one N(1), one N(4), one N(5), one O(1), and one O(2) atom. The Co(1)-N(1) bond length is 2.06 Å. The Co(1)-N(4) bond length is 2.07 Å. The Co(1)-N(5) bond length is 2.11 Å. The Co(1)-O(1) bond length is 2.05 Å. The Co(1)-O(2) bond length is 2.03 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(4), and one H(1) atom. The C(1)-N(1) bond length is 1.33 Å. The C(1)-N(4) bond length is 1.35 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(3), one C(7), and one N(1) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(7) bond length is 1.38 Å. The C(2)-N(1) bond length is 1.39 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one N(2), and one N(3) atom. The C(3)-N(2) bond length is 1.34 Å. The C(3)-N(3) bond length is 1.36 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(4)-O(1) bond length is 1.25 Å. The C(4)-O(2) bond length is 1.26 Å. In the fifth C site, C(7) is bonded in a distorted trigonal planar geometry to one C(2), one N(4), and one N(5) atom. The C(7)-N(4) bond length is 1.36 Å. The C(7)-N(5) bond length is 1.36 Å. In the sixth C site, C(8) is bonded in a trigonal planar geometry to one N(3), one N(5), and one H(7) atom. The C(8)-N(3) bond length is 1.32 Å. The C(8)-N(5) bond length is 1.33 Å. The C(8)-H(7) bond length is 0.93 Å. There are five inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Co(1), one C(1), and one C(2) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(3), one H(8), and one H(9) atom. The N(2)-H(8) bond length is 0.86 Å. The N(2)-H(9) bond length is 0.86 Å. In the third N site, N(3) is bonded in a bent 120 degrees geometry to one C(3) and one C(8) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Co(1), one C(1), and one C(7) atom. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one Co(1), one C(7), and one C(8) atom. There are four 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(7) is bonded in a single-bond geometry to one C(8) atom. In the third H site, H(8) is bonded in a single-bond geometry to one N(2) atom. In the fourth H site, H(9) is bonded in a single-bond geometry to one N(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(4) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Co(1) and one C(4) atom. Linkers: 2 NC1=C2N=CN=C2[N]C=N1 ,2 NC1=NC=[N]=C2[C]1N=C[N]2 ,2 NC1=NC=NC2=NC=N[C]12. Metal clusters: 8 [Co]. The MOF has largest included sphere 5.62 A, density 1.18 g/cm3, surface area 4011.94 m2/g, accessible volume 0.47 cm3/g