CdC28H21(NO)4 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 6-coordinate geometry to one N(1), one N(6), one O(1), one O(3), one O(6), and one O(8) atom. The Cd(1)-N(1) bond length is 2.27 Å. The Cd(1)-N(6) bond length is 2.27 Å. The Cd(1)-O(1) bond length is 2.30 Å. The Cd(1)-O(3) bond length is 2.63 Å. The Cd(1)-O(6) bond length is 2.47 Å. The Cd(1)-O(8) bond length is 2.34 Å. In the second Cd site, Cd(2) is bonded in a 6-coordinate geometry to one N(2), one N(5), one O(2), one O(4), one O(5), and one O(7) atom. The Cd(2)-N(2) bond length is 2.27 Å. The Cd(2)-N(5) bond length is 2.27 Å. The Cd(2)-O(2) bond length is 2.30 Å. The Cd(2)-O(4) bond length is 2.63 Å. The Cd(2)-O(5) bond length is 2.47 Å. The Cd(2)-O(7) bond length is 2.34 Å. There are thirty-six inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(3) atom. The C(1)-C(3) bond length is 1.50 Å. The C(1)-O(1) bond length is 1.29 Å. The C(1)-O(3) bond length is 1.26 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(2), and one O(4) atom. The C(2)-C(4) bond length is 1.50 Å. The C(2)-O(2) bond length is 1.29 Å. The C(2)-O(4) bond length is 1.26 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(1); one C(13); and one C(5,6) atom. The C(3)-C(13) bond length is 1.41 Å. The C(3)-C(5,6) bond length is 1.40 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(14); one C(2); and one C(5,6) atom. The C(4)-C(14) bond length is 1.41 Å. The C(4)-C(5,6) bond length is 1.40 Å. In the fifth C site, C(5,6) is bonded in a distorted single-bond geometry to one C(3); one C(7,8); and one H(1,2) atom. The C(5,6)-C(7,8) bond length is 1.40 Å. The C(5,6)-H(1,2) bond length is 1.09 Å. In the sixth C site, C(7,8) is bonded in a trigonal planar geometry to one C(5,6); one C(7,8); and one C(9,10) atom. The C(7,8)-C(7,8) bond length is 1.47 Å. The C(7,8)-C(9,10) bond length is 1.41 Å. In the seventh C site, C(9,10) is bonded in a distorted single-bond geometry to one C(7,8) and one H(3,4) atom. The C(9,10)-H(3,4) bond length is 1.09 Å. In the eighth C site, C(11,12) is bonded in a distorted single-bond geometry to one C(13) and one H(5,6) atom. The C(11,12)-C(13) bond length is 1.40 Å. The C(11,12)-H(5,6) bond length is 1.09 Å. In the ninth C site, C(13) is bonded in a trigonal planar geometry to one C(11,12); one C(15,16); and one C(3) atom. The C(13)-C(15,16) bond length is 1.50 Å. In the tenth C site, C(14) is bonded in a trigonal planar geometry to one C(11,12); one C(15,16); and one C(4) atom. The C(14)-C(11,12) bond length is 1.40 Å. The C(14)-C(15,16) bond length is 1.50 Å. In the eleventh C site, C(15,16) is bonded in a distorted bent 120 degrees geometry to one C(13), one O(5), and one O(7) atom. The C(15,16)-O(5) bond length is 1.28 Å. The C(15,16)-O(7) bond length is 1.28 Å. In the twelfth C site, C(17,18) is bonded in a trigonal planar geometry to one N(1); one N(3,4); and one H(7,8) atom. The C(17,18)-N(1) bond length is 1.33 Å. The C(17,18)-N(3,4) bond length is 1.36 Å. The C(17,18)-H(7,8) bond length is 1.09 Å. In the thirteenth C site, C(19,20) is bonded in a distorted bent 120 degrees geometry to one C(21,22); one N(1); and one H(9,10) atom. The C(19,20)-C(21,22) bond length is 1.37 Å. The C(19,20)-N(1) bond length is 1.38 Å. The C(19,20)-H(9,10) bond length is 1.08 Å. In the fourteenth C site, C(21,22) is bonded in a distorted trigonal planar geometry to one C(19,20); one N(3,4); and one H(11,12) atom. The C(21,22)-N(3,4) bond length is 1.39 Å. The C(21,22)-H(11,12) bond length is 1.08 Å. In the fifteenth C site, C(23,24) is bonded in a distorted trigonal non-coplanar geometry to one C(25,26); one N(3,4); one H(13,14); and one H(15,16) atom. The C(23,24)-C(25,26) bond length is 1.50 Å. The C(23,24)-N(3,4) bond length is 1.48 Å. The C(23,24)-H(13,14) bond length is 1.10 Å. The C(23,24)-H(15,16) bond length is 1.10 Å. In the sixteenth C site, C(25,26) is bonded in a trigonal planar geometry to one C(23,24); one C(27,28); and one C(35,36) atom. The C(25,26)-C(27,28) bond length is 1.40 Å. The C(25,26)-C(35,36) bond length is 1.40 Å. In the seventeenth C site, C(27,28) is bonded in a distorted single-bond geometry to one C(25,26) and one H(17,18) atom. The C(27,28)-H(17,18) bond length is 1.09 Å. In the eighteenth C site, C(29,30) is bonded in a distorted single-bond geometry to one C(31,32) and one H(19,20) atom. The C(29,30)-C(31,32) bond length is 1.41 Å. The C(29,30)-H(19,20) bond length is 1.09 Å. In the nineteenth C site, C(31,32) is bonded in a trigonal planar geometry to one C(29,30); one C(33,34); and one C(51) atom. The C(31,32)-C(33,34) bond length is 1.41 Å. The C(31,32)-C(51) bond length is 1.48 Å. In the twentieth C site, C(33,34) is bonded in a distorted single-bond geometry to one C(31,32); one C(35,36); and one H(21,22) atom. The C(33,34)-C(35,36) bond length is 1.40 Å. The C(33,34)-H(21,22) bond length is 1.09 Å. In the twenty-first C site, C(35,36) is bonded in a distorted trigonal planar geometry to one C(25,26); one C(33,34); and one H(23,24) atom. The C(35,36)-H(23,24) bond length is 1.09 Å. In the twenty-second C site, C(37,38) is bonded in a trigonal planar geometry to one N(5), one N(7), and one H(25) atom. The C(37,38)-N(5) bond length is 1.33 Å. The C(37,38)-N(7) bond length is 1.36 Å. The C(37,38)-H(25) bond length is 1.09 Å. In the twenty-third C site, C(39,40) is bonded in a distorted bent 120 degrees geometry to one C(41), one N(5), and one H(27) atom. The C(39,40)-C(41) bond length is 1.38 Å. The C(39,40)-N(5) bond length is 1.38 Å. The C(39,40)-H(27) bond length is 1.08 Å. In the twenty-fourth C site, C(41) is bonded in a distorted bent 120 degrees geometry to one C(39,40); one N(7); and one H(29,30) atom. The C(41)-N(7) bond length is 1.38 Å. The C(41)-H(29,30) bond length is 1.08 Å. In the twenty-fifth C site, C(42) is bonded in a distorted bent 120 degrees geometry to one C(39,40); one N(8); and one H(29,30) atom. The C(42)-C(39,40) bond length is 1.38 Å. The C(42)-N(8) bond length is 1.38 Å. The C(42)-H(29,30) bond length is 1.08 Å. In the twenty-sixth C site, C(43) is bonded in a distorted trigonal non-coplanar geometry to one C(45,46); one N(7); one H(31,32); and one H(33,34) atom. The C(43)-C(45,46) bond length is 1.51 Å. The C(43)-N(7) bond length is 1.47 Å. The C(43)-H(31,32) bond length is 1.10 Å. The C(43)-H(33,34) bond length is 1.10 Å. In the twenty-seventh C site, C(44) is bonded in a distorted trigonal non-coplanar geometry to one C(45,46); one N(8); one H(31,32); and one H(33,34) atom. The C(44)-C(45,46) bond length is 1.51 Å. The C(44)-N(8) bond length is 1.47 Å. The C(44)-H(31,32) bond length is 1.10 Å. The C(44)-H(33,34) bond length is 1.10 Å. In the twenty-eighth C site, C(45,46) is bonded in a trigonal planar geometry to one C(43), one C(47), and one C(55) atom. The C(45,46)-C(47) bond length is 1.40 Å. The C(45,46)-C(55) bond length is 1.40 Å. In the twenty-ninth C site, C(47) is bonded in a distorted trigonal planar geometry to one C(45,46); one C(49,50); and one H(35,36) atom. The C(47)-C(49,50) bond length is 1.39 Å. The C(47)-H(35,36) bond length is 1.09 Å. In the thirtieth C site, C(48) is bonded in a distorted trigonal planar geometry to one C(45,46); one C(49,50); and one H(35,36) atom. The C(48)-C(45,46) bond length is 1.40 Å. The C(48)-C(49,50) bond length is 1.39 Å. The C(48)-H(35,36) bond length is 1.09 Å. In the thirty-first C site, C(49,50) is bonded in a distorted single-bond geometry to one C(47), one C(51), and one H(37) atom. The C(49,50)-C(51) bond length is 1.41 Å. The C(49,50)-H(37) bond length is 1.09 Å. In the thirty-second C site, C(51) is bonded in a trigonal planar geometry to one C(31,32); one C(49,50); and one C(53,54) atom. The C(51)-C(53,54) bond length is 1.40 Å. In the thirty-third C site, C(52) is bonded in a trigonal planar geometry to one C(31,32); one C(49,50); and one C(53,54) atom. The C(52)-C(31,32) bond length is 1.48 Å. The C(52)-C(49,50) bond length is 1.41 Å. The C(52)-C(53,54) bond length is 1.40 Å. In the thirty-fourth C site, C(53,54) is bonded in a distorted single-bond geometry to one C(51) and one H(39,40) atom. The C(53,54)-H(39,40) bond length is 1.09 Å. In the thirty-fifth C site, C(55) is bonded in a distorted single-bond geometry to one C(45,46) and one H(41,42) atom. The C(55)-H(41,42) bond length is 1.09 Å. In the thirty-sixth C site, C(56) is bonded in a distorted single-bond geometry to one C(45,46) and one H(41,42) atom. The C(56)-C(45,46) bond length is 1.40 Å. The C(56)-H(41,42) bond length is 1.09 Å. There are seven inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Cd(1); one C(17,18); and one C(19,20) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Cd(2); one C(17,18); and one C(19,20) atom. The N(2)-C(17,18) bond length is 1.33 Å. The N(2)-C(19,20) bond length is 1.38 Å. In the third N site, N(3,4) is bonded in a trigonal planar geometry to one C(17,18); one C(21,22); and one C(23,24) atom. In the fourth N site, N(5) is bonded in a distorted trigonal planar geometry to one Cd(2); one C(37,38); and one C(39,40) atom. In the fifth N site, N(6) is bonded in a distorted trigonal planar geometry to one Cd(1); one C(37,38); and one C(39,40) atom. The N(6)-C(37,38) bond length is 1.33 Å. The N(6)-C(39,40) bond length is 1.38 Å. In the sixth N site, N(7) is bonded in a trigonal planar geometry to one C(37,38); one C(41); and one C(43) atom. In the seventh N site, N(8) is bonded in a trigonal planar geometry to one C(37,38); one C(42); and one C(44) atom. The N(8)-C(37,38) bond length is 1.36 Å. There are twenty-four inequivalent H sites. In the first H site, H(1,2) is bonded in a single-bond geometry to one C(5,6) atom. In the second H site, H(3,4) is bonded in a single-bond geometry to one C(9,10) atom. In the third H site, H(5,6) is bonded in a single-bond geometry to one C(11,12) atom. In the fourth H site, H(7,8) is bonded in a single-bond geometry to one C(17,18) atom. In the fifth H site, H(9,10) is bonded in a single-bond geometry to one C(19,20) atom. In the sixth H site, H(11,12) is bonded in a single-bond geometry to one C(21,22) atom. In the seventh H site, H(13,14) is bonded in a single-bond geometry to one C(23,24) atom. In the eighth H site, H(15,16) is bonded in a single-bond geometry to one C(23,24) atom. In the ninth H site, H(17,18) is bonded in a single-bond geometry to one C(27,28) atom. In the tenth H site, H(19,20) is bonded in a single-bond geometry to one C(29,30) atom. In the eleventh H site, H(21,22) is bonded in a single-bond geometry to one C(33,34) atom. In the twelfth H site, H(23,24) is bonded in a single-bond geometry to one C(35,36) atom. In the thirteenth H site, H(25) is bonded in a single-bond geometry to one C(37,38) atom. In the fourteenth H site, H(26) is bonded in a single-bond geometry to one C(37,38) atom. The H(26)-C(37,38) bond length is 1.09 Å. In the fifteenth H site, H(27) is bonded in a single-bond geometry to one C(39,40) atom. In the sixteenth H site, H(28) is bonded in a single-bond geometry to one C(39,40) atom. The H(28)-C(39,40) bond length is 1.08 Å. In the seventeenth H site, H(29,30) is bonded in a single-bond geometry to one C(41) atom. In the eighteenth H site, H(31,32) is bonded in a single-bond geometry to one C(43) atom. In the nineteenth H site, H(33,34) is bonded in a single-bond geometry to one C(43) atom. In the twentieth H site, H(35,36) is bonded in a single-bond geometry to one C(47) atom. In the twenty-first H site, H(37) is bonded in a single-bond geometry to one C(49,50) atom. In the twenty-second H site, H(38) is bonded in a single-bond geometry to one C(49,50) atom. The H(38)-C(49,50) bond length is 1.09 Å. In the twenty-third H site, H(39,40) is bonded in a single-bond geometry to one C(53,54) atom. In the twenty-fourth H site, H(41,42) is bonded in a single-bond geometry to one C(55) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Cd(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Cd(2) and one C(2) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Cd(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Cd(2) and one C(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Cd(2) and one C(15,16) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Cd(1) and one C(15,16) atom. The O(6)-C(15,16) bond length is 1.28 Å. In the seventh O site, O(7) is bonded in a distorted L-shaped geometry to one Cd(2) and one C(15,16) atom. In the eighth O site, O(8) is bonded in a distorted L-shaped geometry to one Cd(1) and one C(15,16) atom. The O(8)-C(15,16) bond length is 1.28 Å. Linkers: 4 c1cn(Cc2ccc(-c3ccc(Cn4ccnc4)cc3)cc2)cn1 ,2 [O]C(=O)c1ccc(-c2ccc(C([O])=O)c(C([O])=O)c2)cc1C([O])=O. Metal clusters: 4 O=[C]O[Cd]1O[C]O1. The MOF has largest included sphere 3.72 A, density 1.46 g/cm3, surface area 4528.69 m2/g, accessible volume 0.17 cm3/g