NaC2N7H6O2 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one N(11), one N(3), one N(6), one N(9), one O(2), and one O(3) atom. The Na(1)-N(11) bond length is 2.67 Å. The Na(1)-N(3) bond length is 2.55 Å. The Na(1)-N(6) bond length is 2.57 Å. The Na(1)-N(9) bond length is 2.48 Å. The Na(1)-O(2) bond length is 2.69 Å. The Na(1)-O(3) bond length is 2.34 Å. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one N(1), one N(14), one N(2), one N(4), one O(1), and one O(4) atom. The Na(2)-N(1) bond length is 2.44 Å. The Na(2)-N(14) bond length is 2.65 Å. The Na(2)-N(2) bond length is 2.54 Å. The Na(2)-N(4) bond length is 2.52 Å. The Na(2)-O(1) bond length is 2.42 Å. The Na(2)-O(4) bond length is 2.45 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(2), one N(3), and one N(5) atom. The C(1)-N(2) bond length is 1.32 Å. The C(1)-N(3) bond length is 1.38 Å. The C(1)-N(5) bond length is 1.38 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one N(1), one N(5), and one N(7) atom. The C(2)-N(1) bond length is 1.34 Å. The C(2)-N(5) bond length is 1.38 Å. The C(2)-N(7) bond length is 1.34 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one N(10), one N(12), and one N(9) atom. The C(3)-N(10) bond length is 1.38 Å. The C(3)-N(12) bond length is 1.39 Å. The C(3)-N(9) bond length is 1.32 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one N(12), one N(14), and one N(8) atom. The C(4)-N(12) bond length is 1.37 Å. The C(4)-N(14) bond length is 1.36 Å. The C(4)-N(8) bond length is 1.33 Å. There are fourteen inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Na(2), one C(2), and one N(2) atom. The N(1)-N(2) bond length is 1.40 Å. In the second N site, N(2) is bonded in a distorted single-bond geometry to one Na(2), one C(1), and one N(1) atom. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Na(1), one C(1), and one N(4) atom. The N(3)-N(4) bond length is 1.29 Å. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one Na(2), one N(3), and one O(1) atom. The N(4)-O(1) bond length is 1.30 Å. In the fifth N site, N(5) is bonded in a distorted trigonal planar geometry to one C(1), one C(2), and one N(6) atom. The N(5)-N(6) bond length is 1.39 Å. In the sixth N site, N(6) is bonded in a distorted water-like geometry to one Na(1), one N(5), one H(1), and one H(2) atom. The N(6)-H(1) bond length is 1.03 Å. The N(6)-H(2) bond length is 1.03 Å. In the seventh N site, N(7) is bonded in a trigonal planar geometry to one C(2), one H(3), and one H(4) atom. The N(7)-H(3) bond length is 1.02 Å. The N(7)-H(4) bond length is 1.04 Å. In the eighth N site, N(8) is bonded in a 3-coordinate geometry to one C(4), one N(9), and one H(9) atom. The N(8)-N(9) bond length is 1.39 Å. The N(8)-H(9) bond length is 1.67 Å. In the ninth N site, N(9) is bonded in a 3-coordinate geometry to one Na(1), one C(3), and one N(8) atom. In the tenth N site, N(10) is bonded in a 2-coordinate geometry to one C(3) and one N(11) atom. The N(10)-N(11) bond length is 1.30 Å. In the eleventh N site, N(11) is bonded in a distorted single-bond geometry to one Na(1), one N(10), and one O(2) atom. The N(11)-O(2) bond length is 1.30 Å. In the twelfth N site, N(12) is bonded in a distorted trigonal planar geometry to one C(3), one C(4), and one N(13) atom. The N(12)-N(13) bond length is 1.39 Å. In the thirteenth N site, N(13) is bonded in a distorted bent 120 degrees geometry to one N(12), one H(5), and one H(6) atom. The N(13)-H(5) bond length is 1.03 Å. The N(13)-H(6) bond length is 1.03 Å. In the fourteenth N site, N(14) is bonded in a 3-coordinate geometry to one Na(2), one C(4), one H(7), and one H(8) atom. The N(14)-H(7) bond length is 1.03 Å. The N(14)-H(8) bond length is 1.03 Å. There are twelve inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(6) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(7) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(13) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one N(13) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one N(14) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one N(14) atom. In the ninth H site, H(9) is bonded in a distorted single-bond geometry to one N(8) and one O(3) atom. The H(9)-O(3) bond length is 1.01 Å. In the tenth H site, H(10) is bonded in a single-bond geometry to one O(3) atom. The H(10)-O(3) bond length is 0.99 Å. In the eleventh H site, H(11) is bonded in a single-bond geometry to one O(4) atom. The H(11)-O(4) bond length is 0.98 Å. In the twelfth H site, H(12) is bonded in a single-bond geometry to one O(4) atom. The H(12)-O(4) bond length is 1.00 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Na(2) and one N(4) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Na(1) and one N(11) atom. In the third O site, O(3) is bonded in a distorted water-like geometry to one Na(1), one H(10), and one H(9) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one Na(2), one H(11), and one H(12) atom. Linkers: 4 Nc1nnc([N][N][O])n1N. Metal clusters: 4 [Na]. The MOF has largest included sphere 2.32 A, density 1.79 g/cm3, surface area 2957.13 m2/g, accessible volume 0.05 cm3/g