Li2C2H4S(NO3)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(3), one O(6), and two equivalent O(5) atoms to form LiO5 trigonal bipyramids that share  a cornercorner with one Li(2)O6 octahedra,  a cornercorner with one S(1)N2O2 tetrahedra,  an edgeedge with one Li(2)O6 octahedra, and  an edgeedge with one Li(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 58°. The Li(1)-O(2) bond length is 2.19 Å. The Li(1)-O(3) bond length is 1.99 Å. The Li(1)-O(6) bond length is 1.96 Å. There is one shorter (2.10 Å) and one longer (2.11 Å) Li(1)-O(5) bond length. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), one O(6), and two equivalent O(4) atoms to form distorted LiO6 octahedra that share corners with two equivalent S(1)N2O2 tetrahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid,  an edgeedge with one Li(2)O6 octahedra, and  an edgeedge with one Li(1)O5 trigonal bipyramid. The Li(2)-O(1) bond length is 2.19 Å. The Li(2)-O(2) bond length is 2.26 Å. The Li(2)-O(3) bond length is 2.09 Å. The Li(2)-O(6) bond length is 2.01 Å. There is one shorter (2.04 Å) and one longer (2.45 Å) Li(2)-O(4) bond length. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one N(1) and one O(3) atom. The C(1)-N(1) bond length is 1.34 Å. The C(1)-O(3) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one N(2) and one O(4) atom. The C(2)-N(2) bond length is 1.35 Å. The C(2)-O(4) bond length is 1.24 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one C(1), one H(4), and one S(1) atom. The N(1)-H(4) bond length is 1.74 Å. The N(1)-S(1) bond length is 1.63 Å. In the second N site, N(2) is bonded in a distorted water-like geometry to one C(2) and one S(1) atom. The N(2)-S(1) bond length is 1.65 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. The H(1)-O(5) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(5) atom. The H(2)-O(5) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(6) atom. The H(3)-O(6) bond length is 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(1) and one O(6) atom. The H(4)-O(6) bond length is 1.00 Å. S(1) is bonded to one N(1), one N(2), one O(1), and one O(2) atom to form SN2O2 tetrahedra that share corners with two equivalent Li(2)O6 octahedra and  a cornercorner with one Li(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 34-40°. The S(1)-O(1) bond length is 1.45 Å. The S(1)-O(2) bond length is 1.46 Å. There are six inequivalent O sites. In the first O site, O(6) is bonded in a distorted tetrahedral geometry to one Li(1), one Li(2), one H(3), and one H(4) atom. In the second O site, O(1) is bonded in a bent 150 degrees geometry to one Li(2) and one S(1) atom. In the third O site, O(5) is bonded in a distorted water-like geometry to two equivalent Li(1), one H(1), and one H(2) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), and one S(1) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Li(1), one Li(2), and one C(1) atom. In the sixth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Li(2) and one C(2) atom. Linkers: 4 O=C1[N]S(=O)(=O)[N]C1=O. Metal clusters: 8 [Li]. The MOF has largest included sphere 1.48 A, density 2.03 g/cm3, surface area 2769.48 m2/g, accessible volume 0.04 cm3/g