CuC12N2H10(O3Cl)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted octahedral geometry to two equivalent N(1), two equivalent O(3), and two equivalent O(5) atoms. Both Cu(1)-N(1) bond lengths are 2.05 Å. Both Cu(1)-O(3) bond lengths are 1.98 Å. Both Cu(1)-O(5) bond lengths are 2.45 Å. In the second Cu site, Cu(2) is bonded in a distorted octahedral geometry to two equivalent N(2), two equivalent O(2), and two equivalent O(6) atoms. Both Cu(2)-N(2) bond lengths are 2.00 Å. Both Cu(2)-O(2) bond lengths are 2.00 Å. Both Cu(2)-O(6) bond lengths are 2.53 Å. There are twelve inequivalent C sites. In the first C site, C(11) is bonded in a distorted trigonal planar geometry to one C(10), one N(2), and one H(9) atom. The C(11)-C(10) bond length is 1.39 Å. The C(11)-N(2) bond length is 1.34 Å. The C(11)-H(9) bond length is 1.09 Å. In the second C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(8), one N(2), and one H(10) atom. The C(12)-C(8) bond length is 1.39 Å. The C(12)-N(2) bond length is 1.34 Å. The C(12)-H(10) bond length is 1.09 Å. In the third C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(1), and one H(5) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.34 Å. The C(1)-H(5) bond length is 1.09 Å. In the fourth C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one Cl(1) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-Cl(1) bond length is 1.72 Å. In the fifth C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(4), and one H(6) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(6) bond length is 1.09 Å. In the sixth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(6) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-C(6) bond length is 1.51 Å. In the seventh C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one H(7) atom. The C(5)-N(1) bond length is 1.34 Å. The C(5)-H(7) bond length is 1.09 Å. In the eighth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(4), 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 1.28 Å. In the ninth C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(3), and one O(4) atom. The C(7)-C(8) bond length is 1.50 Å. The C(7)-O(3) bond length is 1.28 Å. The C(7)-O(4) bond length is 1.26 Å. In the tenth C site, C(8) is bonded in a trigonal planar geometry to one C(12), one C(7), and one C(9) atom. The C(8)-C(9) bond length is 1.40 Å. In the eleventh C site, C(9) is bonded in a distorted trigonal planar geometry to one C(10), one C(8), and one H(8) atom. The C(9)-C(10) bond length is 1.39 Å. The C(9)-H(8) bond length is 1.09 Å. In the twelfth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(9), and one Cl(2) atom. The C(10)-Cl(2) bond length is 1.72 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cu(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 Cu(2), one C(11), and one C(12) atom. There are ten 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 0.99 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 0.98 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(6) atom. The H(4)-O(6) bond length is 0.98 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(1) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(3) 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 C(9) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(11) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(12) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one C(6) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(2) and one C(6) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(7) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one C(7) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one Cu(1), one H(1), and one H(2) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one Cu(2), one H(3), and one H(4) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a single-bond geometry to one C(2) atom. In the second Cl site, Cl(2) is bonded in a single-bond geometry to one C(10) atom. Linkers: 1 [O]C(=O)C1=CC(Cl)=CN([Cu](OC(=O)c2cncc(Cl)c2)(OC(=O)c2cncc(Cl)c2)N2[CH]C(Cl)=CC(C([O])=O)=C2)[CH]1 ,4 [O]C(=O)c1cncc(Cl)c1. Metal clusters: 2 O.O.O=[C]O[Cu]O[C]=O ,1 O=[C]O[Cu]O[C]=O. The MOF has largest included sphere 2.70 A, density 1.77 g/cm3, surface area 4032.77 m2/g, accessible volume 0.13 cm3/g