Ni3C30P4H30(N4O7)2(C5NH4)2 crystallizes in the triclinic P-1 space group. The structure consists of one 4,4'-bipyridine molecule inside a Ni3C30P4H30(N4O7)2 framework. In the Ni3C30P4H30(N4O7)2 framework, there are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent N(4), two equivalent O(2), and two equivalent O(6) atoms to form NiN2O4 octahedra that share corners with two equivalent P(1)CO3 tetrahedra and corners with two equivalent P(2)CO3 tetrahedra. Both Ni(1)-N(4) bond lengths are 2.06 Å. Both Ni(1)-O(2) bond lengths are 2.03 Å. Both Ni(1)-O(6) bond lengths are 2.12 Å. In the second Ni site, Ni(2) is bonded to one N(1), one N(3), one O(1), one O(3), one O(4), and one O(7) atom to form NiN2O4 octahedra that share  a cornercorner with one C(1)P2CO tetrahedra,  a cornercorner with one P(2)CO3 tetrahedra, and corners with two equivalent P(1)CO3 tetrahedra. The Ni(2)-N(1) bond length is 2.04 Å. The Ni(2)-N(3) bond length is 2.02 Å. The Ni(2)-O(1) bond length is 2.14 Å. The Ni(2)-O(3) bond length is 2.22 Å. The Ni(2)-O(4) bond length is 2.01 Å. The Ni(2)-O(7) bond length is 2.11 Å. There are fifteen inequivalent C sites. In the first C site, C(1) is bonded to one C(2), one P(1), one P(2), and one O(1) atom to form distorted CP2CO tetrahedra that share  a cornercorner with one Ni(2)N2O4 octahedra. The corner-sharing octahedral tilt angles are 77°. The C(1)-C(2) bond length is 1.52 Å. The C(1)-P(1) bond length is 1.88 Å. The C(1)-P(2) bond length is 1.86 Å. The C(1)-O(1) bond length is 1.45 Å. In the second C site, C(2) is bonded in a distorted trigonal non-coplanar geometry to one C(1), one N(2), one H(3), and one H(4) atom. The C(2)-N(2) bond length is 1.46 Å. The C(2)-H(3) bond length is 1.10 Å. The C(2)-H(4) bond length is 1.10 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(5) atom. The C(3)-N(1) bond length is 1.33 Å. The C(3)-N(2) bond length is 1.36 Å. The C(3)-H(5) bond length is 1.08 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(5), one N(1), and one H(6) atom. The C(4)-C(5) bond length is 1.37 Å. The C(4)-N(1) bond length is 1.38 Å. The C(4)-H(6) bond length is 1.08 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(2), and one H(7) atom. The C(5)-N(2) bond length is 1.38 Å. The C(5)-H(7) bond length is 1.08 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(7), one N(3), and one H(8) atom. The C(6)-C(7) bond length is 1.39 Å. The C(6)-N(3) bond length is 1.35 Å. The C(6)-H(8) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(6), one C(8), and one H(9) atom. The C(7)-C(8) bond length is 1.40 Å. The C(7)-H(9) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(13), one C(7), and one C(9) atom. The C(8)-C(13) bond length is 1.47 Å. The C(8)-C(9) bond length is 1.40 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(8) and one H(10) atom. The C(9)-H(10) bond length is 1.09 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one N(3) and one H(11) atom. The C(10)-N(3) bond length is 1.35 Å. The C(10)-H(11) bond length is 1.09 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal planar geometry to one C(12), one N(4), and one H(12) atom. The C(11)-C(12) bond length is 1.39 Å. The C(11)-N(4) bond length is 1.35 Å. The C(11)-H(12) bond length is 1.09 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal planar geometry to one C(11), one C(13), and one H(13) atom. The C(12)-C(13) bond length is 1.40 Å. The C(12)-H(13) bond length is 1.09 Å. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one C(12), one C(14), and one C(8) atom. The C(13)-C(14) bond length is 1.40 Å. In the fourteenth C site, C(14) is bonded in a distorted trigonal planar geometry to one C(13), one C(15), and one H(14) atom. The C(14)-C(15) bond length is 1.39 Å. The C(14)-H(14) bond length is 1.09 Å. In the fifteenth C site, C(15) is bonded in a distorted trigonal planar geometry to one C(14), one N(4), and one H(15) atom. The C(15)-N(4) bond length is 1.34 Å. The C(15)-H(15) bond length is 1.09 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one C(1), one O(2), one O(3), and one O(4) atom to form distorted PCO3 tetrahedra that share  a cornercorner with one Ni(1)N2O4 octahedra, corners with two equivalent Ni(2)N2O4 octahedra, and  a cornercorner with one P(2)CO3 tetrahedra. The corner-sharing octahedral tilt angles range from 42-67°. The P(1)-O(2) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.55 Å. The P(1)-O(4) bond length is 1.53 Å. In the second P site, P(2) is bonded to one C(1), one O(5), one O(6), and one O(7) atom to form distorted PCO3 tetrahedra that share  a cornercorner with one Ni(1)N2O4 octahedra,  a cornercorner with one Ni(2)N2O4 octahedra, and  a cornercorner with one P(1)CO3 tetrahedra. The corner-sharing octahedral tilt angles range from 53-66°. The P(2)-O(5) bond length is 1.63 Å. The P(2)-O(6) bond length is 1.51 Å. The P(2)-O(7) bond length is 1.52 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Ni(2), one C(3), and one C(4) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(5) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one Ni(2), one C(10), and one C(6) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Ni(1), one C(11), and one C(15) atom. There are fifteen inequivalent H sites. In the first H site, H(1) is bonded in a distorted linear geometry to one O(1) and one O(3) atom. The H(1)-O(1) bond length is 1.03 Å. The H(1)-O(3) bond length is 1.59 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(5) atom. The H(2)-O(5) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(2) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(3) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(4) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(5) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(6) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(7) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(9) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(10) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(11) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one C(12) atom. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one C(14) atom. In the fifteenth H site, H(15) is bonded in a single-bond geometry to one C(15) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ni(2), one C(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Ni(1) and one P(1) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Ni(2), one P(1), and one H(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Ni(2) and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one P(2) and one H(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Ni(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Ni(2) and one P(2) atom. Linkers: 2 [O]P([O])(=O)C(O)(Cn1ccnc1)P([O])(=O)O ,2 c1cc(-c2ccncc2)ccn1. Metal clusters: 3 [Ni]. The MOF has largest included sphere 3.01 A, density 1.70 g/cm3, surface area 3618.66 m2/g, accessible volume 0.14 cm3/g