KNdC4H14(N3O)6 crystallizes in the monoclinic P2_1/m space group. K(1) is bonded in a 6-coordinate geometry to two equivalent N(2), one O(1), one O(5), and two equivalent O(4) atoms. Both K(1)-N(2) bond lengths are 2.81 Å. The K(1)-O(1) bond length is 3.01 Å. The K(1)-O(5) bond length is 2.74 Å. Both K(1)-O(4) bond lengths are 2.87 Å. Nd(1) is bonded in a 9-coordinate geometry to two equivalent N(1), two equivalent N(6), one O(1), one O(2), one O(3), and two equivalent O(4) atoms. Both Nd(1)-N(1) bond lengths are 2.65 Å. Both Nd(1)-N(6) bond lengths are 2.70 Å. The Nd(1)-O(1) bond length is 2.45 Å. The Nd(1)-O(2) bond length is 2.42 Å. The Nd(1)-O(3) bond length is 2.49 Å. Both Nd(1)-O(4) bond lengths are 2.58 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(4), and one N(5) atom. The C(1)-N(1) bond length is 1.35 Å. The C(1)-N(4) bond length is 1.34 Å. The C(1)-N(5) bond length is 1.37 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one N(5), one N(6), and one N(9) atom. The C(2)-N(5) bond length is 1.37 Å. The C(2)-N(6) bond length is 1.34 Å. The C(2)-N(9) bond length is 1.35 Å. There are nine inequivalent N sites. In the first N site, N(1) is bonded in a distorted single-bond geometry to one Nd(1), one C(1), and one N(2) atom. The N(1)-N(2) bond length is 1.36 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one K(1), one N(1), and one N(3) atom. The N(2)-N(3) bond length is 1.31 Å. In the third N site, N(3) is bonded in a 3-coordinate geometry to one N(2), one N(4), and one H(5) atom. The N(3)-N(4) bond length is 1.35 Å. The N(3)-H(5) bond length is 1.77 Å. In the fourth N site, N(4) is bonded in a 3-coordinate geometry to one C(1), one N(3), and one H(2) atom. The N(4)-H(2) bond length is 1.70 Å. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one C(1), one C(2), and one H(1) atom. The N(5)-H(1) bond length is 1.02 Å. In the sixth N site, N(6) is bonded in a distorted single-bond geometry to one Nd(1), one C(2), and one N(7) atom. The N(6)-N(7) bond length is 1.36 Å. In the seventh N site, N(7) is bonded in a distorted water-like geometry to one N(6) and one N(8) atom. The N(7)-N(8) bond length is 1.30 Å. In the eighth N site, N(8) is bonded in a 3-coordinate geometry to one N(7), one N(9), and one H(6) atom. The N(8)-N(9) bond length is 1.35 Å. The N(8)-H(6) bond length is 1.79 Å. In the ninth N site, N(9) is bonded in a distorted single-bond geometry to one C(2) and one N(8) atom. There are seven inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(5) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one N(4) and one O(1) atom. The H(2)-O(1) bond length is 1.01 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) atom. The H(3)-O(2) bond length is 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(3) atom. The H(4)-O(3) bond length is 0.99 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(3) and one O(4) atom. The H(5)-O(4) bond length is 1.00 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one N(8) and one O(4) atom. The H(6)-O(4) bond length is 1.00 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(5) atom. The H(7)-O(5) bond length is 0.99 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one K(1), one Nd(1), and two equivalent H(2) atoms. In the second O site, O(2) is bonded in a distorted water-like geometry to one Nd(1) and two equivalent H(3) atoms. In the third O site, O(3) is bonded in a distorted water-like geometry to one Nd(1) and two equivalent H(4) atoms. In the fourth O site, O(4) is bonded in a water-like geometry to one K(1), one Nd(1), one H(5), and one H(6) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one K(1) and two equivalent H(7) atoms. Linkers: 4 [N]1N=NN=C1NC1=NN=N[N]1. Metal clusters: 2 [K] ,2 [Nd]. The MOF has largest included sphere 2.61 A, density 2.19 g/cm3, surface area 2653.54 m2/g, accessible volume 0.05 cm3/g