Gd2C12H15(NO4)3 crystallizes in the tetragonal I4_1/a space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 9-coordinate geometry to one N(2), one N(3), one O(1), one O(10), one O(3), one O(6), one O(9), and two equivalent O(7) atoms. The Gd(1)-N(2) bond length is 2.58 Å. The Gd(1)-N(3) bond length is 2.60 Å. The Gd(1)-O(1) bond length is 2.41 Å. The Gd(1)-O(10) bond length is 2.36 Å. The Gd(1)-O(3) bond length is 2.43 Å. The Gd(1)-O(6) bond length is 2.51 Å. The Gd(1)-O(9) bond length is 2.42 Å. There is one shorter (2.43 Å) and one longer (2.45 Å) Gd(1)-O(7) bond length. In the second Gd site, Gd(2) is bonded in a 9-coordinate geometry to one N(1), one O(2), one O(3), one O(5), one O(6), one O(8), one O(9), and two equivalent O(4) atoms. The Gd(2)-N(1) bond length is 2.58 Å. The Gd(2)-O(2) bond length is 2.60 Å. The Gd(2)-O(3) bond length is 2.41 Å. The Gd(2)-O(5) bond length is 2.33 Å. The Gd(2)-O(6) bond length is 2.44 Å. The Gd(2)-O(8) bond length is 2.34 Å. The Gd(2)-O(9) bond length is 2.59 Å. There is one shorter (2.33 Å) and one longer (2.45 Å) Gd(2)-O(4) bond length. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(3), and one H(4) atom. The C(1)-N(1) bond length is 1.47 Å. The C(1)-H(3) bond length is 1.10 Å. The C(1)-H(4) bond length is 1.10 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. The C(2)-O(2) bond length is 1.26 Å. The C(2)-O(4) bond length is 1.30 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(5) atom. The C(3)-O(3) bond length is 1.29 Å. The C(3)-O(5) bond length is 1.25 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(6) atom. The C(4)-O(1) bond length is 1.26 Å. The C(4)-O(6) bond length is 1.28 Å. In the fifth C site, C(5) is bonded in a distorted trigonal non-coplanar geometry to one N(2), one H(6), and one H(7) atom. The C(5)-N(2) bond length is 1.46 Å. The C(5)-H(6) bond length is 1.10 Å. The C(5)-H(7) bond length is 1.10 Å. In the sixth C site, C(6) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(8), and one H(9) atom. The C(6)-N(1) bond length is 1.47 Å. The C(6)-H(8) bond length is 1.10 Å. The C(6)-H(9) bond length is 1.10 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one O(8) and one O(9) atom. The C(7)-O(8) bond length is 1.26 Å. The C(7)-O(9) bond length is 1.28 Å. In the eighth C site, C(8) is bonded in a distorted trigonal non-coplanar geometry to one N(3), one H(10), and one H(11) atom. The C(8)-N(3) bond length is 1.47 Å. The C(8)-H(10) bond length is 1.10 Å. The C(8)-H(11) bond length is 1.10 Å. In the ninth C site, C(9) is bonded in a distorted trigonal non-coplanar geometry to one N(2), one H(12), and one H(13) atom. The C(9)-N(2) bond length is 1.47 Å. The C(9)-H(12) bond length is 1.10 Å. The C(9)-H(13) bond length is 1.10 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(7) atom. The C(10)-O(11) bond length is 1.24 Å. The C(10)-O(7) bond length is 1.32 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(12) atom. The C(11)-O(10) bond length is 1.30 Å. The C(11)-O(12) bond length is 1.24 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal non-coplanar geometry to one N(3), one H(14), and one H(15) atom. The C(12)-N(3) bond length is 1.47 Å. The C(12)-H(14) bond length is 1.10 Å. The C(12)-H(15) bond length is 1.10 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal non-coplanar geometry to one Gd(2), one C(1), one C(6), and one H(1) atom. The N(1)-H(1) bond length is 1.02 Å. In the second N site, N(2) is bonded in a distorted trigonal non-coplanar geometry to one Gd(1), one C(5), one C(9), and one H(2) atom. The N(2)-H(2) bond length is 1.02 Å. In the third N site, N(3) is bonded in a 3-coordinate geometry to one Gd(1), one C(12), one C(8), and one H(5) atom. The N(3)-H(5) bond length is 1.02 Å. There are fifteen inequivalent H sites. In the first H site, H(13) is bonded in a single-bond geometry to one C(9) atom. In the second H site, H(14) is bonded in a single-bond geometry to one C(12) atom. In the third H site, H(15) is bonded in a single-bond geometry to one C(12) atom. In the fourth H site, H(1) is bonded in a single-bond geometry to one N(1) atom. In the fifth H site, H(2) is bonded in a single-bond geometry to one N(2) atom. In the sixth H site, H(3) is bonded in a single-bond geometry to one C(1) atom. In the seventh H site, H(4) is bonded in a single-bond geometry to one C(1) atom. In the eighth H site, H(5) is bonded in a single-bond geometry to one N(3) atom. In the ninth H site, H(6) is bonded in a single-bond geometry to one C(5) atom. In the tenth H site, H(7) is bonded in a single-bond geometry to one C(5) atom. In the eleventh H site, H(8) is bonded in a single-bond geometry to one C(6) atom. In the twelfth H site, H(9) is bonded in a single-bond geometry to one C(6) atom. In the thirteenth H site, H(10) is bonded in a single-bond geometry to one C(8) atom. In the fourteenth H site, H(11) is bonded in a single-bond geometry to one C(8) atom. In the fifteenth H site, H(12) is bonded in a single-bond geometry to one C(9) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Gd(1) and one C(4) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Gd(2) and one C(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Gd(1), one Gd(2), and one C(3) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Gd(2) and one C(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Gd(2) and one C(3) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Gd(1), one Gd(2), and one C(4) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent Gd(1) and one C(10) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Gd(2) and one C(7) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Gd(1), one Gd(2), and one C(7) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Gd(1) and one C(11) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one C(10) atom. In the twelfth O site, O(12) is bonded in a single-bond geometry to one C(11) atom. Linkers: 24 [O]C(=O)CNCC([O])=O. Metal clusters: 16 [Gd]. The MOF has largest included sphere 5.08 A, density 2.46 g/cm3, surface area 2246.49 m2/g, accessible volume 0.13 cm3/g