NiC12H21(N3O2)2(CH)2(CH2)4HC2O4 is Indium-derived structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of two 02329_fluka molecules, four 02329_fluka molecules, one formic acid dimer molecule, and one NiC12H21(N3O2)2 cluster. In the NiC12H21(N3O2)2 cluster, Ni(1) is bonded to one N(1), one N(2), one N(3), one N(4), and one O(2) atom to form NiN4O square pyramids that share  a cornercorner with one C(5)H2N2 tetrahedra,  a cornercorner with one C(6)H2N2 tetrahedra,  a cornercorner with one C(7)H2N2 tetrahedra, and  a cornercorner with one C(8)H2N2 tetrahedra. The Ni(1)-N(1) bond length is 1.87 Å. The Ni(1)-N(2) bond length is 1.87 Å. The Ni(1)-N(3) bond length is 1.87 Å. The Ni(1)-N(4) bond length is 1.86 Å. The Ni(1)-O(2) bond length is 2.05 Å. There are twelve inequivalent C sites. In the first C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(8) atom. The C(4)-O(2) bond length is 1.29 Å. The C(4)-O(8) bond length is 1.26 Å. In the second C site, C(5) is bonded to one N(1), one N(5), one H(3), and one H(5) atom to form CH2N2 tetrahedra that share  a cornercorner with one Ni(1)N4O square pyramid and  a cornercorner with one C(7)H2N2 tetrahedra. The C(5)-N(1) bond length is 1.45 Å. The C(5)-N(5) bond length is 1.44 Å. The C(5)-H(3) bond length is 1.10 Å. The C(5)-H(5) bond length is 1.11 Å. In the third C site, C(6) is bonded to one N(2), one N(6), one H(4), and one H(6) atom to form CH2N2 tetrahedra that share  a cornercorner with one Ni(1)N4O square pyramid and  a cornercorner with one C(8)H2N2 tetrahedra. The C(6)-N(2) bond length is 1.44 Å. The C(6)-N(6) bond length is 1.44 Å. The C(6)-H(4) bond length is 1.10 Å. The C(6)-H(6) bond length is 1.11 Å. In the fourth C site, C(7) is bonded to one N(3), one N(5), one H(7), and one H(9) atom to form CH2N2 tetrahedra that share  a cornercorner with one Ni(1)N4O square pyramid and  a cornercorner with one C(5)H2N2 tetrahedra. The C(7)-N(3) bond length is 1.44 Å. The C(7)-N(5) bond length is 1.44 Å. The C(7)-H(7) bond length is 1.11 Å. The C(7)-H(9) bond length is 1.10 Å. In the fifth C site, C(8) is bonded to one N(4), one N(6), one H(10), and one H(8) atom to form CH2N2 tetrahedra that share  a cornercorner with one Ni(1)N4O square pyramid and  a cornercorner with one C(6)H2N2 tetrahedra. The C(8)-N(4) bond length is 1.45 Å. The C(8)-N(6) bond length is 1.44 Å. The C(8)-H(10) bond length is 1.10 Å. The C(8)-H(8) bond length is 1.11 Å. In the sixth C site, C(9) is bonded in a distorted trigonal non-coplanar geometry to one N(5), one H(11), and one H(13) atom. The C(9)-N(5) bond length is 1.47 Å. The C(9)-H(11) bond length is 1.11 Å. The C(9)-H(13) bond length is 1.10 Å. In the seventh C site, C(10) is bonded in a distorted trigonal non-coplanar geometry to one N(6), one H(12), and one H(14) atom. The C(10)-N(6) bond length is 1.48 Å. The C(10)-H(12) bond length is 1.11 Å. The C(10)-H(14) bond length is 1.10 Å. In the eighth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(6) atom. The C(12)-O(4) bond length is 1.33 Å. The C(12)-O(6) bond length is 1.24 Å. In the ninth C site, C(17) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(23), and one H(25) atom. The C(17)-N(1) bond length is 1.44 Å. The C(17)-H(23) bond length is 1.10 Å. The C(17)-H(25) bond length is 1.11 Å. In the tenth C site, C(18) is bonded in a distorted trigonal non-coplanar geometry to one N(2), one H(24), and one H(26) atom. The C(18)-N(2) bond length is 1.44 Å. The C(18)-H(24) bond length is 1.10 Å. The C(18)-H(26) bond length is 1.11 Å. In the eleventh C site, C(19) is bonded in a distorted trigonal non-coplanar geometry to one N(3), one H(27), and one H(29) atom. The C(19)-N(3) bond length is 1.44 Å. The C(19)-H(27) bond length is 1.11 Å. The C(19)-H(29) bond length is 1.10 Å. In the twelfth C site, C(20) is bonded in a distorted trigonal non-coplanar geometry to one N(4), one H(28), and one H(30) atom. The C(20)-N(4) bond length is 1.44 Å. The C(20)-H(28) bond length is 1.11 Å. The C(20)-H(30) bond length is 1.10 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Ni(1), one C(17), and one C(5) atom. In the second N site, N(2) is bonded in a trigonal non-coplanar geometry to one Ni(1), one C(18), and one C(6) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one Ni(1), one C(19), and one C(7) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Ni(1), one C(20), and one C(8) atom. In the fifth N site, N(5) is bonded in a trigonal non-coplanar geometry to one C(5), one C(7), and one C(9) atom. In the sixth N site, N(6) is bonded in a trigonal non-coplanar geometry to one C(10), one C(6), and one C(8) atom. There are twenty-one inequivalent H sites. In the first H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(4) is bonded in a single-bond geometry to one C(6) atom. In the third H site, H(5) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(6) is bonded in a single-bond geometry to one C(6) atom. In the fifth H site, H(7) is bonded in a single-bond geometry to one C(7) atom. In the sixth H site, H(8) is bonded in a single-bond geometry to one C(8) atom. In the seventh H site, H(9) is bonded in a single-bond geometry to one C(7) atom. In the eighth H site, H(10) is bonded in a single-bond geometry to one C(8) atom. In the ninth H site, H(11) is bonded in a single-bond geometry to one C(9) atom. In the tenth H site, H(12) is bonded in a single-bond geometry to one C(10) atom. In the eleventh H site, H(13) is bonded in a single-bond geometry to one C(9) atom. In the twelfth H site, H(14) is bonded in a single-bond geometry to one C(10) atom. In the thirteenth H site, H(23) is bonded in a single-bond geometry to one C(17) atom. In the fourteenth H site, H(24) is bonded in a single-bond geometry to one C(18) atom. In the fifteenth H site, H(25) is bonded in a single-bond geometry to one C(17) atom. In the sixteenth H site, H(26) is bonded in a single-bond geometry to one C(18) atom. In the seventeenth H site, H(27) is bonded in a single-bond geometry to one C(19) atom. In the eighteenth H site, H(28) is bonded in a single-bond geometry to one C(20) atom. In the nineteenth H site, H(29) is bonded in a single-bond geometry to one C(19) atom. In the twentieth H site, H(30) is bonded in a single-bond geometry to one C(20) atom. In the twenty-first H site, H(32) is bonded in a distorted bent 150 degrees geometry to one O(4) and one O(8) atom. The H(32)-O(4) bond length is 1.03 Å. The H(32)-O(8) bond length is 1.56 Å. There are four inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one C(4) atom. In the second O site, O(4) is bonded in a bent 120 degrees geometry to one C(12) and one H(32) atom. In the third O site, O(6) is bonded in a single-bond geometry to one C(12) atom. In the fourth O site, O(8) is bonded in a bent 120 degrees geometry to one C(4) and one H(32) atom. Linkers: 1 O=C(O)CCCN1C[N]CC[N]CN(CCCC(=O)O)C[N]CC[N]C1 ,1 O=[C][C]CCN1C[N]CC[N]CN(CCCC(=O)O)C[N]CC[N]C1 ,2 [CH2]CCN1C[N]CC[N]CN(CCCC(=O)O)C[N]CC[N]C1 ,1 [C]CCN1C[N]CC[N]CN(CCCC(=O)O)C[N]CC[N]C1 ,1 [CH]CCN1C[N]CC[N]CN(CCCC(=O)O)C[N]CC[N]C1 ,1 O=[C][CH]CCN1C[N]CC[N]CN(CCCC(=O)O)C[N]CC[N]C1. Metal clusters: 1 [Ni]. The MOF has largest included sphere 1.74 A, density 1.54 g/cm3, surface area 4725.03 m2/g, accessible volume 0.12 cm3/g