SrC5H2(NO2)2 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 7-coordinate geometry to one N(1), one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms. The Sr(1)-N(1) bond length is 2.68 Å. The Sr(1)-O(2) bond length is 2.50 Å. The Sr(1)-O(4) bond length is 2.51 Å. There is one shorter (2.62 Å) and one longer (2.74 Å) Sr(1)-O(1) bond length. There is one shorter (2.57 Å) and one longer (2.58 Å) Sr(1)-O(3) bond length. There are five inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(2) atom. The C(1)-N(1) bond length is 1.33 Å. The C(1)-N(2) bond length is 1.34 Å. The C(1)-H(2) bond length is 1.08 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one N(2) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(5) bond length is 1.49 Å. The C(2)-N(2) bond length is 1.38 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one N(1) atom. The C(3)-C(4) bond length is 1.48 Å. The C(3)-N(1) bond length is 1.38 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(2) atom. The C(4)-O(1) bond length is 1.28 Å. The C(4)-O(2) bond length is 1.27 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(3), and one O(4) atom. The C(5)-O(3) bond length is 1.29 Å. The C(5)-O(4) bond length is 1.26 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted water-like geometry to one Sr(1), one C(1), and one C(3) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(1), one C(2), and one H(1) atom. The N(2)-H(1) bond length is 1.05 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(2) and one O(2) atom. The H(1)-O(2) bond length is 1.73 Å. In the second H site, H(2) is bonded in a single-bond geometry to one C(1) 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 Sr(1) and one C(4) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Sr(1), one C(4), and one H(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Sr(1) and one C(5) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Sr(1) and one C(5) atom. Linkers: 4 [O]C(=O)c1nc[nH]c1C([O])=O. Metal clusters: 4 [Sr]. The MOF has largest included sphere 1.42 A, density 2.60 g/cm3, surface area 2091.71 m2/g, accessible volume 0.02 cm3/g