Mg3C14H8(NO5)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one N(1), one O(1), one O(3), one O(8), and two equivalent O(6) atoms to form MgNO5 octahedra that share  a cornercorner with one Mg(2)O6 octahedra,  an edgeedge with one Mg(1)NO5 octahedra, and  an edgeedge with one Mg(2)O6 octahedra. The corner-sharing octahedral tilt angles are 60°. The Mg(1)-N(1) bond length is 2.22 Å. The Mg(1)-O(1) bond length is 2.07 Å. The Mg(1)-O(3) bond length is 2.17 Å. The Mg(1)-O(8) bond length is 2.05 Å. There is one shorter (2.05 Å) and one longer (2.08 Å) Mg(1)-O(6) bond length. In the second Mg site, Mg(2) is bonded to one O(1), one O(10), one O(4), one O(5), one O(6), and one O(7) atom to form a mixture of edge and corner-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles range from 59-60°. The Mg(2)-O(1) bond length is 2.08 Å. The Mg(2)-O(10) bond length is 2.03 Å. The Mg(2)-O(4) bond length is 2.04 Å. The Mg(2)-O(5) bond length is 2.08 Å. The Mg(2)-O(6) bond length is 2.11 Å. The Mg(2)-O(7) bond length is 2.08 Å. In the third Mg site, Mg(3) is bonded to one N(2), one O(2), one O(7), one O(9), and two equivalent O(5) atoms to form distorted MgNO5 octahedra that share  a cornercorner with one Mg(2)O6 octahedra,  an edgeedge with one Mg(3)NO5 octahedra, and  an edgeedge with one Mg(2)O6 octahedra. The corner-sharing octahedral tilt angles are 59°. The Mg(3)-N(2) bond length is 2.24 Å. The Mg(3)-O(2) bond length is 2.05 Å. The Mg(3)-O(7) bond length is 2.11 Å. The Mg(3)-O(9) bond length is 2.16 Å. There is one shorter (2.04 Å) and one longer (2.09 Å) Mg(3)-O(5) bond length. There are fourteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one N(1) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-C(6) bond length is 1.51 Å. The C(1)-N(1) bond length is 1.35 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(1) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-H(1) bond length is 0.96 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(7) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-C(7) bond length is 1.51 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3) and one H(2) atom. The C(4)-H(2) bond length is 0.92 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(3) atom. The C(5)-N(1) bond length is 1.34 Å. The C(5)-H(3) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(6)-O(1) bond length is 1.26 Å. The C(6)-O(2) bond length is 1.24 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(7)-O(3) bond length is 1.26 Å. The C(7)-O(4) bond length is 1.26 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(13), one C(9), and one N(2) atom. The C(8)-C(13) bond length is 1.51 Å. The C(8)-C(9) bond length is 1.39 Å. The C(8)-N(2) bond length is 1.35 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(10), one C(8), and one H(6) atom. The C(9)-C(10) bond length is 1.39 Å. The C(9)-H(6) bond length is 0.96 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(14), and one C(9) atom. The C(10)-C(11) bond length is 1.39 Å. The C(10)-C(14) bond length is 1.52 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(10) and one H(7) atom. The C(11)-H(7) bond length is 0.92 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one N(2) and one H(8) atom. The C(12)-N(2) bond length is 1.33 Å. The C(12)-H(8) bond length is 0.94 Å. In the thirteenth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(7), and one O(8) atom. The C(13)-O(7) bond length is 1.26 Å. The C(13)-O(8) bond length is 1.25 Å. In the fourteenth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(10), and one O(9) atom. The C(14)-O(10) bond length is 1.26 Å. The C(14)-O(9) bond length is 1.25 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Mg(1), one C(1), and one C(5) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Mg(3), one C(12), and one C(8) atom. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(5) atom. The H(4)-O(5) bond length is 0.75 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(6) atom. The H(5)-O(6) bond length is 0.76 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(9) 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. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mg(2), and one C(6) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Mg(3) and one C(6) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Mg(1) and one C(7) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Mg(2) and one C(7) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Mg(2), two equivalent Mg(3), and one H(4) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Mg(2), two equivalent Mg(1), and one H(5) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mg(2), one Mg(3), and one C(13) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Mg(1) and one C(13) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Mg(3) and one C(14) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Mg(2) and one C(14) atom. Linkers: 8 [O]C(=O)c1ccnc(C([O])=O)c1. Metal clusters: 12 [Mg]. The MOF has largest included sphere 6.94 A, density 1.14 g/cm3, surface area 3696.03 m2/g, accessible volume 0.47 cm3/g