Zn5C26P4H20(N3O8)2(C3H2)2 crystallizes in the monoclinic P2/c space group. The structure consists of two 2,3-dimethyl-1,3-butadiene molecules inside a Zn5C26P4H20(N3O8)2 framework. In the Zn5C26P4H20(N3O8)2 framework, there are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one N(2), one O(3), one O(5), and one O(6) atom to form ZnNO3 tetrahedra that share  a cornercorner with one P(2)CO3 tetrahedra and corners with two equivalent P(1)CO3 tetrahedra. The Zn(1)-N(2) bond length is 2.05 Å. The Zn(1)-O(3) bond length is 1.96 Å. The Zn(1)-O(5) bond length is 1.92 Å. The Zn(1)-O(6) bond length is 1.90 Å. In the second Zn site, Zn(2) is bonded to one N(1), one N(3), one O(1), one O(4), and one O(7) atom to form distorted ZnN2O3 trigonal bipyramids that share  a cornercorner with one C(2)PH2N tetrahedra,  a cornercorner with one C(4)PH2N tetrahedra,  a cornercorner with one P(1)CO3 tetrahedra, and  a cornercorner with one P(2)CO3 tetrahedra. The Zn(2)-N(1) bond length is 2.28 Å. The Zn(2)-N(3) bond length is 2.06 Å. The Zn(2)-O(1) bond length is 2.05 Å. The Zn(2)-O(4) bond length is 1.99 Å. The Zn(2)-O(7) bond length is 1.99 Å. In the third Zn site, Zn(3) is bonded to two equivalent O(2) and two equivalent O(8) atoms to form ZnO4 tetrahedra that share corners with two equivalent P(2)CO3 tetrahedra. Both Zn(3)-O(2) bond lengths are 1.98 Å. Both Zn(3)-O(8) bond lengths are 1.93 Å. There are thirteen 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 1.26 Å. The C(1)-O(2) bond length is 1.25 Å. In the second C site, C(2) is bonded to one P(2); one N(1); and two equivalent H(1,2) atoms to form distorted CPH2N tetrahedra that share  a cornercorner with one C(4)PH2N tetrahedra and  a cornercorner with one Zn(2)N2O3 trigonal bipyramid. The C(2)-P(2) bond length is 1.82 Å. The C(2)-N(1) bond length is 1.48 Å. Both C(2)-H(1,2) bond lengths are 0.97 Å. In the third C site, C(3) is bonded in a 3-coordinate geometry to one N(1) and two equivalent H(3,4) atoms. The C(3)-N(1) bond length is 1.47 Å. Both C(3)-H(3,4) bond lengths are 0.97 Å. In the fourth C site, C(4) is bonded to one P(1); one N(1); and two equivalent H(5,6) atoms to form distorted CPH2N tetrahedra that share  a cornercorner with one C(2)PH2N tetrahedra and  a cornercorner with one Zn(2)N2O3 trigonal bipyramid. The C(4)-P(1) bond length is 1.81 Å. The C(4)-N(1) bond length is 1.50 Å. Both C(4)-H(5,6) bond lengths are 0.97 Å. In the fifth C site, C(5) is bonded in a 2-coordinate geometry to one C(6), one C(7), and one N(2) atom. The C(5)-C(6) bond length is 1.41 Å. The C(5)-C(7) bond length is 0.86 Å. The C(5)-N(2) bond length is 1.37 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(5), one C(8), and one C(9) atom. The C(6)-C(8) bond length is 0.94 Å. The C(6)-C(9) bond length is 1.44 Å. In the seventh C site, C(7) is bonded in a 2-coordinate geometry to one C(5), one C(8), and one N(2) atom. The C(7)-C(8) bond length is 1.38 Å. The C(7)-N(2) bond length is 1.36 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(6), one C(7), and one C(9) atom. The C(8)-C(9) bond length is 1.39 Å. In the ninth C site, C(9) is bonded in a 4-coordinate geometry to one C(10), one C(6), one C(8), and one C(9) atom. The C(9)-C(10) bond length is 1.36 Å. The C(9)-C(9) bond length is 1.50 Å. In the tenth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(11), one C(9), and one H(7) atom. The C(10)-C(11) bond length is 1.36 Å. The C(10)-H(7) bond length is 0.93 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(10), one N(2), and one H(8) atom. The C(11)-N(2) bond length is 1.32 Å. The C(11)-H(8) bond length is 0.93 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one N(3) and one H(9) atom. The C(12)-N(3) bond length is 1.33 Å. The C(12)-H(9) bond length is 0.93 Å. In the thirteenth C site, C(16) is bonded in a 2-coordinate geometry to one N(3) and one H(12) atom. The C(16)-N(3) bond length is 1.32 Å. The C(16)-H(12) bond length is 0.93 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one C(4), one O(3), one O(4), and one O(5) atom to form PCO3 tetrahedra that share  a cornercorner with one N(1)ZnC3 tetrahedra, corners with two equivalent Zn(1)NO3 tetrahedra, and  a cornercorner with one Zn(2)N2O3 trigonal bipyramid. The P(1)-O(3) bond length is 1.52 Å. The P(1)-O(4) bond length is 1.53 Å. The P(1)-O(5) bond length is 1.52 Å. In the second P site, P(2) is bonded to one C(2), one O(6), one O(7), and one O(8) atom to form PCO3 tetrahedra that share  a cornercorner with one Zn(1)NO3 tetrahedra,  a cornercorner with one Zn(3)O4 tetrahedra,  a cornercorner with one N(1)ZnC3 tetrahedra, and  a cornercorner with one Zn(2)N2O3 trigonal bipyramid. The P(2)-O(6) bond length is 1.51 Å. The P(2)-O(7) bond length is 1.53 Å. The P(2)-O(8) bond length is 1.53 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded to one Zn(2), one C(2), one C(3), and one C(4) atom to form NZnC3 tetrahedra that share  a cornercorner with one P(1)CO3 tetrahedra and  a cornercorner with one P(2)CO3 tetrahedra. In the second N site, N(2) is bonded in a 4-coordinate geometry to one Zn(1), one C(11), one C(5), and one C(7) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one Zn(2), one C(12), and one C(16) atom. There are seven inequivalent H sites. In the first H site, H(1,2) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(3,4) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(5,6) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(7) is bonded in a single-bond geometry to one C(10) atom. In the fifth H site, H(8) is bonded in a single-bond geometry to one C(11) atom. In the sixth H site, H(9) is bonded in a single-bond geometry to one C(12) atom. In the seventh H site, H(12) is bonded in a single-bond geometry to one C(16) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(3) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Zn(2) and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Zn(2) and one P(2) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Zn(3) and one P(2) atom. Linkers: 2 [C]1[C][C]2[N]C=C[C][C]12.[C]1[C][C]2[N]C=C[C][C]12 ,2 c1cc(-c2ccncc2)ccn1. Metal clusters: 10 [Zn]. The MOF has largest included sphere 4.78 A, density 1.48 g/cm3, surface area 3624.63 m2/g, accessible volume 0.30 cm3/g