Na2CuC10N2H20O11 crystallizes in the monoclinic C2/c space group. Na(1) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(6) atoms to form distorted NaO6 octahedra that share  a cornercorner with one Cu(1)N2O4 octahedra,  an edgeedge with one Na(1)O6 octahedra, and  a faceface with one Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. The Na(1)-O(1) bond length is 2.34 Å. The Na(1)-O(5) bond length is 2.56 Å. There is one shorter (2.37 Å) and one longer (2.42 Å) Na(1)-O(3) bond length. There is one shorter (2.38 Å) and one longer (2.52 Å) Na(1)-O(6) bond length. Cu(1) is bonded to two equivalent N(1), two equivalent O(1), and two equivalent O(4) atoms to form distorted CuN2O4 octahedra that share corners with two equivalent Na(1)O6 octahedra and corners with two equivalent C(5)H3N tetrahedra. The corner-sharing octahedral tilt angles are 54°. Both Cu(1)-N(1) bond lengths are 2.03 Å. Both Cu(1)-O(1) bond lengths are 2.49 Å. Both Cu(1)-O(4) bond lengths are 1.99 Å. There are five inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.28 Å. In the second C site, C(2) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(1), and one H(2) atom. The C(2)-N(1) bond length is 1.48 Å. The C(2)-H(1) bond length is 1.10 Å. The C(2)-H(2) bond length is 1.10 Å. In the third C site, C(3) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(3), and one H(4) atom. The C(3)-N(1) bond length is 1.49 Å. The C(3)-H(3) bond length is 1.10 Å. The C(3)-H(4) bond length is 1.10 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(4)-O(3) bond length is 1.25 Å. The C(4)-O(4) bond length is 1.29 Å. In the fifth C site, C(5) is bonded to one N(1), one H(5), one H(6), and one H(7) atom to form CH3N tetrahedra that share  a cornercorner with one Cu(1)N2O4 octahedra. The corner-sharing octahedral tilt angles are 70°. The C(5)-N(1) bond length is 1.48 Å. The C(5)-H(5) bond length is 1.10 Å. The C(5)-H(6) bond length is 1.10 Å. The C(5)-H(7) bond length is 1.10 Å. N(1) is bonded to one Cu(1), one C(2), one C(3), and one C(5) atom to form corner-sharing NCuC3 tetrahedra. There are ten 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(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(3) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(5) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(5) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(5) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one O(5) atom. The H(8)-O(5) bond length is 0.99 Å. In the ninth H site, H(9) is bonded in a distorted linear geometry to one O(2) and one O(6) atom. The H(9)-O(2) bond length is 1.66 Å. The H(9)-O(6) bond length is 1.00 Å. In the tenth H site, H(10) is bonded in a single-bond geometry to one O(6) atom. The H(10)-O(6) bond length is 0.98 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Cu(1), and one C(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one C(1) and one H(9) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Na(1) and one C(4) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a water-like geometry to two equivalent Na(1) and two equivalent H(8) atoms. In the sixth O site, O(6) is bonded in a distorted water-like geometry to two equivalent Na(1), one H(10), and one H(9) atom. Linkers: 4 CN(CC([O])=O)CC([O])=O ,6 O. Metal clusters: 4 [Na] ,2 [Cu]. The MOF has largest included sphere 1.89 A, density 1.82 g/cm3, surface area 3147.49 m2/g, accessible volume 0.08 cm3/g