CsC11H3(N3O)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 10-coordinate geometry to one N(1), one N(2), one N(8), three equivalent N(7), two equivalent O(1), and two equivalent O(2) atoms. The Cs(1)-N(1) bond length is 3.16 Å. The Cs(1)-N(2) bond length is 3.15 Å. The Cs(1)-N(8) bond length is 3.28 Å. There are a spread of Cs(1)-N(7) bond distances ranging from 3.49-3.72 Å. There is one shorter (3.15 Å) and one longer (3.30 Å) Cs(1)-O(1) bond length. There is one shorter (3.28 Å) and one longer (3.41 Å) Cs(1)-O(2) bond length. In the second Cs site, Cs(2) is bonded in a 10-coordinate geometry to one N(11), one N(4), one N(5), one N(9), two equivalent N(3), two equivalent O(3), and two equivalent O(4) atoms. The Cs(2)-N(11) bond length is 3.49 Å. The Cs(2)-N(4) bond length is 3.27 Å. The Cs(2)-N(5) bond length is 3.22 Å. The Cs(2)-N(9) bond length is 3.19 Å. There is one shorter (3.55 Å) and one longer (3.72 Å) Cs(2)-N(3) bond length. There is one shorter (3.36 Å) and one longer (3.38 Å) Cs(2)-O(3) bond length. There is one shorter (3.30 Å) and one longer (3.33 Å) Cs(2)-O(4) bond length. There are twenty-two inequivalent C sites. In the first C site, C(1) is bonded in a distorted linear geometry to one C(6) and one N(1) atom. The C(1)-C(6) bond length is 1.40 Å. The C(1)-N(1) bond length is 1.17 Å. In the second C site, C(2) is bonded in a distorted linear geometry to one C(7) and one N(2) atom. The C(2)-C(7) bond length is 1.40 Å. The C(2)-N(2) bond length is 1.17 Å. In the third C site, C(3) is bonded in a distorted linear geometry to one C(8) and one N(3) atom. The C(3)-C(8) bond length is 1.41 Å. The C(3)-N(3) bond length is 1.17 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(9) and one N(4) atom. The C(4)-C(9) bond length is 1.41 Å. The C(4)-N(4) bond length is 1.17 Å. In the fifth C site, C(5) is bonded in a distorted linear geometry to one C(10) and one N(5) atom. The C(5)-C(10) bond length is 1.40 Å. The C(5)-N(5) bond length is 1.17 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(1), one C(10), and one C(7) atom. The C(6)-C(10) bond length is 1.42 Å. The C(6)-C(7) bond length is 1.42 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(8) atom. The C(7)-C(8) bond length is 1.42 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(3), one C(7), and one C(9) atom. The C(8)-C(9) bond length is 1.42 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(4), and one C(8) atom. The C(9)-C(10) bond length is 1.42 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(5), one C(6), and one C(9) atom. In the eleventh C site, C(11) is bonded in a tetrahedral geometry to one N(6), one H(1), one H(2), and one H(3) atom. The C(11)-N(6) bond length is 1.49 Å. The C(11)-H(1) bond length is 1.10 Å. The C(11)-H(2) bond length is 1.09 Å. The C(11)-H(3) bond length is 1.09 Å. In the twelfth C site, C(12) is bonded in a distorted linear geometry to one C(17) and one N(7) atom. The C(12)-C(17) bond length is 1.41 Å. The C(12)-N(7) bond length is 1.17 Å. In the thirteenth C site, C(13) is bonded in a distorted linear geometry to one C(18) and one N(8) atom. The C(13)-C(18) bond length is 1.41 Å. The C(13)-N(8) bond length is 1.17 Å. In the fourteenth C site, C(14) is bonded in a distorted linear geometry to one C(19) and one N(9) atom. The C(14)-C(19) bond length is 1.40 Å. The C(14)-N(9) bond length is 1.17 Å. In the fifteenth C site, C(15) is bonded in a distorted linear geometry to one C(20) and one N(10) atom. The C(15)-C(20) bond length is 1.41 Å. The C(15)-N(10) bond length is 1.17 Å. In the sixteenth C site, C(16) is bonded in a distorted single-bond geometry to one C(21) and one N(11) atom. The C(16)-C(21) bond length is 1.41 Å. The C(16)-N(11) bond length is 1.17 Å. In the seventeenth C site, C(17) is bonded in a trigonal planar geometry to one C(12), one C(18), and one C(21) atom. The C(17)-C(18) bond length is 1.42 Å. The C(17)-C(21) bond length is 1.43 Å. In the eighteenth C site, C(18) is bonded in a trigonal planar geometry to one C(13), one C(17), and one C(19) atom. The C(18)-C(19) bond length is 1.42 Å. In the nineteenth C site, C(19) is bonded in a trigonal planar geometry to one C(14), one C(18), and one C(20) atom. The C(19)-C(20) bond length is 1.42 Å. In the twentieth C site, C(20) is bonded in a trigonal planar geometry to one C(15), one C(19), and one C(21) atom. The C(20)-C(21) bond length is 1.42 Å. In the twenty-first C site, C(21) is bonded in a trigonal planar geometry to one C(16), one C(17), and one C(20) atom. In the twenty-second C site, C(22) is bonded in a tetrahedral geometry to one N(12), one H(4), one H(5), and one H(6) atom. The C(22)-N(12) bond length is 1.48 Å. The C(22)-H(4) bond length is 1.09 Å. The C(22)-H(5) bond length is 1.09 Å. The C(22)-H(6) bond length is 1.10 Å. There are twelve inequivalent N sites. In the first N site, N(1) is bonded in a distorted single-bond geometry to one Cs(1) and one C(1) atom. In the second N site, N(2) is bonded in a distorted single-bond geometry to one Cs(1) and one C(2) atom. In the third N site, N(3) is bonded in a single-bond geometry to two equivalent Cs(2) and one C(3) atom. In the fourth N site, N(4) is bonded in a single-bond geometry to one Cs(2) and one C(4) atom. In the fifth N site, N(5) is bonded in a distorted single-bond geometry to one Cs(2) and one C(5) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one C(11), one O(1), and one O(2) atom. The N(6)-O(1) bond length is 1.24 Å. The N(6)-O(2) bond length is 1.24 Å. In the seventh N site, N(7) is bonded in a single-bond geometry to three equivalent Cs(1) and one C(12) atom. In the eighth N site, N(8) is bonded in a distorted single-bond geometry to one Cs(1) and one C(13) atom. In the ninth N site, N(9) is bonded in a distorted single-bond geometry to one Cs(2) and one C(14) atom. In the tenth N site, N(10) is bonded in a single-bond geometry to one C(15) atom. In the eleventh N site, N(11) is bonded in a single-bond geometry to one Cs(2) and one C(16) atom. In the twelfth N site, N(12) is bonded in a trigonal planar geometry to one C(22), one O(3), and one O(4) atom. The N(12)-O(3) bond length is 1.24 Å. The N(12)-O(4) bond length is 1.24 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(11) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(11) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(11) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(22) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(22) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(22) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Cs(1) and one N(6) atom. In the second O site, O(2) is bonded in a single-bond geometry to two equivalent Cs(1) and one N(6) atom. In the third O site, O(3) is bonded in a single-bond geometry to two equivalent Cs(2) and one N(12) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to two equivalent Cs(2) and one N(12) atom. Linkers: 4 C[N+](=O)[O-] ,4 N#C[C]1C(C#N)=C(C#N)C(C#N)=C1C#N. Metal clusters: 4 [Cs]. The MOF has largest included sphere 2.77 A, density 1.83 g/cm3, surface area 4471.37 m2/g, accessible volume 0.13 cm3/g