CoH8(C3N)4 crystallizes in the triclinic P-1 space group. Co(1) is bonded in a distorted see-saw-like geometry to one N(1), one N(2), one N(3), and one N(4) atom. The Co(1)-N(1) bond length is 1.91 Å. The Co(1)-N(2) bond length is 2.01 Å. The Co(1)-N(3) bond length is 1.91 Å. The Co(1)-N(4) bond length is 1.96 Å. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(5), one N(1), and one H(1) atom. The C(1)-C(5) bond length is 1.41 Å. The C(1)-N(1) bond length is 1.34 Å. The C(1)-H(1) bond length is 1.08 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(6), one N(2), and one H(2) atom. The C(2)-C(6) bond length is 1.41 Å. The C(2)-N(2) bond length is 1.35 Å. The C(2)-H(2) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(5), one N(3), and one H(3) atom. The C(3)-C(5) bond length is 1.42 Å. The C(3)-N(3) bond length is 1.34 Å. The C(3)-H(3) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(6), one N(4), and one H(4) atom. The C(4)-C(6) bond length is 1.41 Å. The C(4)-N(4) bond length is 1.35 Å. The C(4)-H(4) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(5)-C(7) bond length is 1.46 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(8) atom. The C(6)-C(8) bond length is 1.46 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(11), one C(5), and one C(9) atom. The C(7)-C(11) bond length is 1.41 Å. The C(7)-C(9) bond length is 1.41 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(6) atom. The C(8)-C(10) bond length is 1.41 Å. The C(8)-C(12) bond length is 1.41 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(11), one C(7), and one H(5) atom. The C(9)-C(11) bond length is 1.39 Å. The C(9)-H(5) bond length is 1.09 Å. In the tenth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(12), one C(8), and one H(6) atom. The C(10)-C(12) bond length is 1.39 Å. The C(10)-H(6) bond length is 1.09 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal planar geometry to one C(7), one C(9), and one H(7) atom. The C(11)-H(7) bond length is 1.09 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal planar geometry to one C(10), one C(8), and one H(8) atom. The C(12)-H(8) bond length is 1.09 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Co(1), one C(1), and one N(3) atom. The N(1)-N(3) bond length is 1.36 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Co(1), one C(2), and one N(4) atom. The N(2)-N(4) bond length is 1.36 Å. In the third N site, N(3) is bonded in a 3-coordinate geometry to one Co(1), one C(3), and one N(1) atom. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one Co(1), one C(4), and one N(2) atom. There are eight 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(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(10) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(11) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(12) atom. Linkers: 1 C1=N[N]C=C1c1ccc([C]2C=NN=C2)cc1 ,1 [CH]1N=NC=C1c1ccc([C]2C=NN=C2)cc1. Metal clusters: 2 [Co]. The MOF has largest included sphere 8.34 A, density 0.98 g/cm3, surface area 4117.97 m2/g, accessible volume 0.53 cm3/g