Co(C13N3)2 crystallizes in the tetragonal P4/ncc space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in an octahedral geometry to one N(3), one N(4), and four equivalent N(1) atoms. The Co(1)-N(3) bond length is 2.11 Å. The Co(1)-N(4) bond length is 2.12 Å. All Co(1)-N(1) bond lengths are 2.14 Å. In the second Co site, Co(2) is bonded in an octahedral geometry to two equivalent N(5) and four equivalent N(2) atoms. Both Co(2)-N(5) bond lengths are 2.12 Å. All Co(2)-N(2) bond lengths are 2.13 Å. There are fifteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(2) and one N(1) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.14 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. The C(2)-C(3) bond length is 1.41 Å. The C(2)-C(4) bond length is 1.47 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one N(2) atom. The C(3)-N(2) bond length is 1.14 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(2), one C(5), and one C(6) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-C(6) bond length is 1.38 Å. In the fifth C site, C(5) is bonded in a bent 120 degrees geometry to one C(4) and one C(6) atom. The C(5)-C(6) bond length is 1.38 Å. In the sixth C site, C(6) is bonded in a bent 120 degrees geometry to one C(4) and one C(5) atom. In the seventh C site, C(7) is bonded in a single-bond geometry to one C(8) and one N(3) atom. The C(7)-C(8) bond length is 1.39 Å. The C(7)-N(3) bond length is 1.35 Å. In the eighth C site, C(8) is bonded in a 4-coordinate geometry to one C(13), one C(7), and two equivalent C(8) atoms. The C(8)-C(13) bond length is 1.41 Å. Both C(8)-C(8) bond lengths are 1.68 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(14) atom. The C(9)-C(14) bond length is 1.40 Å. In the tenth C site, C(10) is bonded in a single-bond geometry to one N(4) atom. The C(10)-N(4) bond length is 1.34 Å. In the eleventh C site, C(11) is bonded in a single-bond geometry to one C(12) and one N(5) atom. The C(11)-C(12) bond length is 1.37 Å. The C(11)-N(5) bond length is 1.35 Å. In the twelfth C site, C(12) is bonded in a bent 120 degrees geometry to one C(11) and one C(15) atom. The C(12)-C(15) bond length is 1.39 Å. In the thirteenth C site, C(13) is bonded in a 5-coordinate geometry to one C(14) and four equivalent C(8) atoms. The C(13)-C(14) bond length is 1.46 Å. In the fourteenth C site, C(14) is bonded in a 5-coordinate geometry to one C(13) and four equivalent C(9) atoms. In the fifteenth C site, C(15) is bonded in a trigonal planar geometry to one C(15) and two equivalent C(12) atoms. The C(15)-C(15) bond length is 1.49 Å. There are five inequivalent N sites. In the first N site, N(5) is bonded in a trigonal planar geometry to one Co(2) and two equivalent C(11) atoms. In the second N site, N(1) is bonded in a linear geometry to one Co(1) and one C(1) atom. In the third N site, N(2) is bonded in a bent 150 degrees geometry to one Co(2) and one C(3) atom. In the fourth N site, N(3) is bonded in a 5-coordinate geometry to one Co(1) and four equivalent C(7) atoms. In the fifth N site, N(4) is bonded in a 5-coordinate geometry to one Co(1) and four equivalent C(10) atoms. Linkers: 2 [C@@]123[C@]45[C@]62[C@]21[C@]34[C@]13[C@]45[C@]56[C@]21[N@]345.[C@@]123[C@]45[C@]62[C@]21[C@]34[C@]13[C@]45[C@]56[C@]21[N@@]345 ,4 [c]1[c]c(-c2[c][c]n[c][c]2)[c][c]n1 ,1 [C@@]123[C@]45[C@]62[C@]21[C@]34[C@]13[C@]45[C@]56[C@]21[N@@]345.[C@@]123[C@]45[C@]62[C@]21[C@]34[C@]13[C@]45[C@]56[C@]21[N@@]345 ,1 [C@@]123[C@]45[C@]62[C@]21[C@]34[C@]13[C@]45[C@]56[C@]21[N@]345.[C@@]123[C@]45[C@]62[C@]21[C@]34[C@]13[C@]45[C@]56[C@]21[N@]345. Metal clusters: 8 [Co]. The MOF has largest included sphere 6.75 A, density 0.89 g/cm3, surface area 4362.83 m2/g, accessible volume 0.63 cm3/g