NiH8(CO4)2(CH2)2 crystallizes in the triclinic P1 space group. The structure consists of eight 02329_fluka molecules inside a NiH8(CO4)2 framework. In the NiH8(CO4)2 framework, there are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in an octahedral geometry to one O(1), one O(17), one O(21), one O(25), one O(29), and one O(9) atom. The Ni(1)-O(1) bond length is 2.09 Å. The Ni(1)-O(17) bond length is 2.14 Å. The Ni(1)-O(21) bond length is 2.10 Å. The Ni(1)-O(25) bond length is 2.07 Å. The Ni(1)-O(29) bond length is 2.04 Å. The Ni(1)-O(9) bond length is 2.09 Å. In the second Ni site, Ni(2) is bonded in an octahedral geometry to one O(10), one O(18), one O(2), one O(22), one O(26), and one O(30) atom. The Ni(2)-O(10) bond length is 2.10 Å. The Ni(2)-O(18) bond length is 2.13 Å. The Ni(2)-O(2) bond length is 2.09 Å. The Ni(2)-O(22) bond length is 2.08 Å. The Ni(2)-O(26) bond length is 2.08 Å. The Ni(2)-O(30) bond length is 2.06 Å. In the third Ni site, Ni(3) is bonded in an octahedral geometry to one O(11), one O(19), one O(23), one O(27), one O(3), and one O(31) atom. The Ni(3)-O(11) bond length is 2.10 Å. The Ni(3)-O(19) bond length is 2.13 Å. The Ni(3)-O(23) bond length is 2.08 Å. The Ni(3)-O(27) bond length is 2.08 Å. The Ni(3)-O(3) bond length is 2.09 Å. The Ni(3)-O(31) bond length is 2.05 Å. In the fourth Ni site, Ni(4) is bonded in an octahedral geometry to one O(12), one O(20), one O(24), one O(28), one O(32), and one O(4) atom. The Ni(4)-O(12) bond length is 2.10 Å. The Ni(4)-O(20) bond length is 2.13 Å. The Ni(4)-O(24) bond length is 2.08 Å. The Ni(4)-O(28) bond length is 2.07 Å. The Ni(4)-O(32) bond length is 2.06 Å. The Ni(4)-O(4) bond length is 2.09 Å. There are eight 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(5) atom. The C(1)-O(1) bond length is 1.29 Å. The C(1)-O(5) bond length is 1.27 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(6) atom. The C(2)-O(2) bond length is 1.29 Å. The C(2)-O(6) bond length is 1.27 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(7) atom. The C(3)-O(3) bond length is 1.29 Å. The C(3)-O(7) bond length is 1.27 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(8) atom. The C(4)-O(4) bond length is 1.29 Å. The C(4)-O(8) bond length is 1.27 Å. In the fifth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(9) atom. The C(13)-O(13) bond length is 1.28 Å. The C(13)-O(9) bond length is 1.28 Å. In the sixth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(14,15) atom. The C(14)-O(10) bond length is 1.28 Å. The C(14)-O(14,15) bond length is 1.28 Å. In the seventh C site, C(15) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(14,15) atom. The C(15)-O(11) bond length is 1.28 Å. The C(15)-O(14,15) bond length is 1.28 Å. In the eighth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one O(12) and one O(16) atom. The C(16)-O(12) bond length is 1.28 Å. The C(16)-O(16) bond length is 1.28 Å. There are thirty-two inequivalent H sites. In the first H site, H(17) is bonded in a distorted single-bond geometry to one O(17) and one O(7) atom. The H(17)-O(17) bond length is 1.01 Å. The H(17)-O(7) bond length is 1.67 Å. In the second H site, H(18) is bonded in a distorted single-bond geometry to one O(18) and one O(8) atom. The H(18)-O(18) bond length is 1.01 Å. The H(18)-O(8) bond length is 1.66 Å. In the third H site, H(19) is bonded in a distorted single-bond geometry to one O(19) and one O(5) atom. The H(19)-O(19) bond length is 1.01 Å. The H(19)-O(5) bond length is 1.67 Å. In the fourth H site, H(20) is bonded in a distorted single-bond geometry to one O(20) and one O(6) atom. The H(20)-O(20) bond length is 1.01 Å. The H(20)-O(6) bond length is 1.66 Å. In the fifth H site, H(21) is bonded in a distorted single-bond geometry to one O(13) and one O(17) atom. The H(21)-O(13) bond length is 1.63 Å. The H(21)-O(17) bond length is 1.01 Å. In the sixth H site, H(22) is bonded in a distorted single-bond geometry to one O(14,15) and one O(18) atom. The H(22)-O(14,15) bond length is 1.63 Å. The H(22)-O(18) bond length is 1.01 Å. In the seventh H site, H(23) is bonded in a distorted single-bond geometry to one O(14,15) and one O(19) atom. The H(23)-O(14,15) bond length is 1.63 Å. The H(23)-O(19) bond length is 1.01 Å. In the eighth H site, H(24) is bonded in a distorted single-bond geometry to one O(16) and one O(20) atom. The H(24)-O(16) bond length is 1.63 Å. The H(24)-O(20) bond length is 1.01 Å. In the ninth H site, H(25) is bonded in a distorted single-bond geometry to one O(21) and one O(4) atom. The H(25)-O(21) bond length is 1.01 Å. The H(25)-O(4) bond length is 1.66 Å. In the tenth H site, H(26) is bonded in a distorted single-bond geometry to one O(22) and one O(3) atom. The H(26)-O(22) bond length is 1.01 Å. The H(26)-O(3) bond length is 1.65 Å. In the eleventh H site, H(27) is bonded in a distorted single-bond geometry to one O(2) and one O(23) atom. The H(27)-O(2) bond length is 1.66 Å. The H(27)-O(23) bond length is 1.01 Å. In the twelfth H site, H(28) is bonded in a distorted single-bond geometry to one O(1) and one O(24) atom. The H(28)-O(1) bond length is 1.65 Å. The H(28)-O(24) bond length is 1.01 Å. In the thirteenth H site, H(29) is bonded in a single-bond geometry to one O(13) and one O(21) atom. The H(29)-O(13) bond length is 1.68 Å. The H(29)-O(21) bond length is 1.00 Å. In the fourteenth H site, H(30) is bonded in a single-bond geometry to one O(14,15) and one O(22) atom. The H(30)-O(14,15) bond length is 1.68 Å. The H(30)-O(22) bond length is 1.00 Å. In the fifteenth H site, H(31) is bonded in a single-bond geometry to one O(14,15) and one O(23) atom. The H(31)-O(14,15) bond length is 1.68 Å. The H(31)-O(23) bond length is 1.00 Å. In the sixteenth H site, H(32) is bonded in a single-bond geometry to one O(16) and one O(24) atom. The H(32)-O(16) bond length is 1.68 Å. The H(32)-O(24) bond length is 1.00 Å. In the seventeenth H site, H(33) is bonded in a single-bond geometry to one O(25) atom. The H(33)-O(25) bond length is 0.99 Å. In the eighteenth H site, H(34) is bonded in a single-bond geometry to one O(26) atom. The H(34)-O(26) bond length is 0.99 Å. In the nineteenth H site, H(35) is bonded in a single-bond geometry to one O(27) atom. The H(35)-O(27) bond length is 0.99 Å. In the twentieth H site, H(36) is bonded in a single-bond geometry to one O(28) atom. The H(36)-O(28) bond length is 0.99 Å. In the twenty-first H site, H(37) is bonded in a single-bond geometry to one O(25) atom. The H(37)-O(25) bond length is 0.99 Å. In the twenty-second H site, H(38) is bonded in a single-bond geometry to one O(26) atom. The H(38)-O(26) bond length is 0.99 Å. In the twenty-third H site, H(39) is bonded in a single-bond geometry to one O(27) atom. The H(39)-O(27) bond length is 0.99 Å. In the twenty-fourth H site, H(40) is bonded in a single-bond geometry to one O(28) atom. The H(40)-O(28) bond length is 0.99 Å. In the twenty-fifth H site, H(41) is bonded in a single-bond geometry to one O(29) atom. The H(41)-O(29) bond length is 0.99 Å. In the twenty-sixth H site, H(42) is bonded in a single-bond geometry to one O(30) atom. The H(42)-O(30) bond length is 0.99 Å. In the twenty-seventh H site, H(43) is bonded in a single-bond geometry to one O(31) atom. The H(43)-O(31) bond length is 0.99 Å. In the twenty-eighth H site, H(44) is bonded in a single-bond geometry to one O(32) atom. The H(44)-O(32) bond length is 0.99 Å. In the twenty-ninth H site, H(45) is bonded in a distorted single-bond geometry to one O(29) and one O(5) atom. The H(45)-O(29) bond length is 1.00 Å. The H(45)-O(5) bond length is 1.64 Å. In the thirtieth H site, H(46) is bonded in a distorted single-bond geometry to one O(30) and one O(6) atom. The H(46)-O(30) bond length is 1.00 Å. The H(46)-O(6) bond length is 1.64 Å. In the thirty-first H site, H(47) is bonded in a distorted single-bond geometry to one O(31) and one O(7) atom. The H(47)-O(31) bond length is 1.00 Å. The H(47)-O(7) bond length is 1.65 Å. In the thirty-second H site, H(48) is bonded in a distorted single-bond geometry to one O(32) and one O(8) atom. The H(48)-O(32) bond length is 1.00 Å. The H(48)-O(8) bond length is 1.65 Å. There are thirty-one inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ni(1), one C(1), and one H(28) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ni(2), one C(2), and one H(27) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ni(3), one C(3), and one H(26) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ni(4), one C(4), and one H(25) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one C(1), one H(19), and one H(45) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one C(2), one H(20), and one H(46) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one C(3), one H(17), and one H(47) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one C(4), one H(18), and one H(48) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one Ni(1) and one C(13) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Ni(2) and one C(14) atom. In the eleventh O site, O(11) is bonded in a 2-coordinate geometry to one Ni(3) and one C(15) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one Ni(4) and one C(16) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one C(13), one H(21), and one H(29) atom. In the fourteenth O site, O(14,15) is bonded in a distorted trigonal planar geometry to one C(14), one H(22), and one H(30) atom. In the fifteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one C(16), one H(24), and one H(32) atom. In the sixteenth O site, O(17) is bonded in a distorted water-like geometry to one Ni(1), one H(17), and one H(21) atom. In the seventeenth O site, O(18) is bonded in a distorted water-like geometry to one Ni(2), one H(18), and one H(22) atom. In the eighteenth O site, O(19) is bonded in a distorted water-like geometry to one Ni(3), one H(19), and one H(23) atom. In the nineteenth O site, O(20) is bonded in a distorted water-like geometry to one Ni(4), one H(20), and one H(24) atom. In the twentieth O site, O(21) is bonded in a distorted water-like geometry to one Ni(1), one H(25), and one H(29) atom. In the twenty-first O site, O(22) is bonded in a distorted water-like geometry to one Ni(2), one H(26), and one H(30) atom. In the twenty-second O site, O(23) is bonded in a distorted water-like geometry to one Ni(3), one H(27), and one H(31) atom. In the twenty-third O site, O(24) is bonded in a distorted water-like geometry to one Ni(4), one H(28), and one H(32) atom. In the twenty-fourth O site, O(25) is bonded in a distorted water-like geometry to one Ni(1), one H(33), and one H(37) atom. In the twenty-fifth O site, O(26) is bonded in a distorted water-like geometry to one Ni(2), one H(34), and one H(38) atom. In the twenty-sixth O site, O(27) is bonded in a distorted water-like geometry to one Ni(3), one H(35), and one H(39) atom. In the twenty-seventh O site, O(28) is bonded in a distorted water-like geometry to one Ni(4), one H(36), and one H(40) atom. In the twenty-eighth O site, O(29) is bonded in a distorted water-like geometry to one Ni(1), one H(41), and one H(45) atom. In the twenty-ninth O site, O(30) is bonded in a distorted water-like geometry to one Ni(2), one H(42), and one H(46) atom. In the thirtieth O site, O(31) is bonded in a distorted water-like geometry to one Ni(3), one H(43), and one H(47) atom. In the thirty-first O site, O(32) is bonded in a distorted water-like geometry to one Ni(4), one H(44), and one H(48) atom. Linkers: 4 [O]C(=O)CCC([O])=O. Metal clusters: 4 O.O.O.O.O=[C]O[Ni]O[C]=O. The MOF has largest included sphere 1.58 A, density 2.07 g/cm3, surface area 3272.09 m2/g, accessible volume 0.08 cm3/g