BaNiC4H6O11(CH2)2 crystallizes in the monoclinic Cc space group. The structure consists of eight 02329_fluka molecules inside a BaNiC4H6O11 framework. In the BaNiC4H6O11 framework, Ba(1) is bonded in a 9-coordinate geometry to one O(1), one O(5), one O(6), one O(7), one O(8), two equivalent O(11), and two equivalent O(4) atoms. The Ba(1)-O(1) bond length is 2.78 Å. The Ba(1)-O(5) bond length is 2.84 Å. The Ba(1)-O(6) bond length is 2.81 Å. The Ba(1)-O(7) bond length is 2.93 Å. The Ba(1)-O(8) bond length is 3.01 Å. There is one shorter (2.74 Å) and one longer (2.75 Å) Ba(1)-O(11) bond length. There is one shorter (2.79 Å) and one longer (2.91 Å) Ba(1)-O(4) bond length. Ni(1) is bonded in an octahedral geometry to one O(1), one O(10), one O(3), one O(5), one O(7), and one O(9) atom. The Ni(1)-O(1) bond length is 2.07 Å. The Ni(1)-O(10) bond length is 2.14 Å. The Ni(1)-O(3) bond length is 2.00 Å. The Ni(1)-O(5) bond length is 2.06 Å. The Ni(1)-O(7) bond length is 2.05 Å. The Ni(1)-O(9) bond length is 2.10 Å. There are four 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 1.28 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(3)-O(3) bond length is 1.28 Å. The C(3)-O(4) bond length is 1.26 Å. In the third C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(4)-O(5) bond length is 1.28 Å. The C(4)-O(6) bond length is 1.26 Å. In the fourth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(7) and one O(8) atom. The C(6)-O(7) bond length is 1.28 Å. The C(6)-O(8) bond length is 1.28 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a distorted linear geometry to one O(2) and one O(9) atom. The H(1)-O(2) bond length is 1.64 Å. The H(1)-O(9) bond length is 1.00 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(9) atom. The H(2)-O(9) bond length is 0.99 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(10) atom. The H(3)-O(10) bond length is 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(10) atom. The H(4)-O(10) bond length is 1.00 Å. In the fifth H site, H(5) is bonded in a linear geometry to one O(11) and one O(3) atom. The H(5)-O(11) bond length is 1.01 Å. The H(5)-O(3) bond length is 1.59 Å. In the sixth H site, H(6) is bonded in a distorted single-bond geometry to one O(11) and one O(2) atom. The H(6)-O(11) bond length is 1.00 Å. The H(6)-O(2) bond length is 1.68 Å. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ba(1), one Ni(1), and one C(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one C(1), one H(1), and one H(6) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ni(1), one C(3), and one H(5) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one C(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Ba(1), one Ni(1), and one C(4) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Ba(1) and one C(4) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Ba(1), one Ni(1), and one C(6) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one Ba(1) and one C(6) atom. In the ninth O site, O(9) is bonded in a distorted water-like geometry to one Ni(1), one H(1), and one H(2) atom. In the tenth O site, O(10) is bonded in a distorted water-like geometry to one Ni(1), one H(3), and one H(4) atom. In the eleventh O site, O(11) is bonded in a water-like geometry to two equivalent Ba(1), one H(5), and one H(6) atom. Linkers: 4 [O]C(=O)CC([O])=O. Metal clusters: 2 [Ba] ,2 [Ni]. The MOF has largest included sphere 2.15 A, density 2.49 g/cm3, surface area 2671.63 m2/g, accessible volume 0.06 cm3/g