Cd3C34P4H34(NO2)6(C2H3)2C3H2 crystallizes in the triclinic P-1 space group. The structure consists of one 2,3-dimethyl-1,3-butadiene molecule and two cyclobutane molecules inside a Cd3C34P4H34(NO2)6 framework. In the Cd3C34P4H34(NO2)6 framework, there are four inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one N(1), one N(6), one O(10), one O(3), and one O(8) atom to form CdN2O3 square pyramids that share  a cornercorner with one P(1)CO3 tetrahedra and  a cornercorner with one P(3)CO3 tetrahedra. The Cd(1)-N(1) bond length is 2.33 Å. The Cd(1)-N(6) bond length is 2.32 Å. The Cd(1)-O(10) bond length is 2.28 Å. The Cd(1)-O(3) bond length is 2.31 Å. The Cd(1)-O(8) bond length is 2.32 Å. In the second Cd site, Cd(2) is bonded to one N(2), one N(4), one O(1), one O(11), and one O(4) atom to form CdN2O3 square pyramids that share  a cornercorner with one P(1)CO3 tetrahedra and  a cornercorner with one P(2)CO3 tetrahedra. The Cd(2)-N(2) bond length is 2.33 Å. The Cd(2)-N(4) bond length is 2.36 Å. The Cd(2)-O(1) bond length is 2.31 Å. The Cd(2)-O(11) bond length is 2.22 Å. The Cd(2)-O(4) bond length is 2.32 Å. In the third Cd site, Cd(3) is bonded in a square co-planar geometry to two equivalent N(3) and two equivalent O(9) atoms. Both Cd(3)-N(3) bond lengths are 2.31 Å. Both Cd(3)-O(9) bond lengths are 2.26 Å. In the fourth Cd site, Cd(4) is bonded in a square co-planar geometry to two equivalent N(5) and two equivalent O(6) atoms. Both Cd(4)-N(5) bond lengths are 2.35 Å. Both Cd(4)-O(6) bond lengths are 2.24 Å. There are thirty-four inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one P(1), and one H(1) atom. The C(1)-C(2) bond length is 1.27 Å. The C(1)-P(1) bond length is 1.78 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(1), one H(2), and one H(3) atom. The C(2)-H(2) bond length is 0.93 Å. The C(2)-H(3) bond length is 0.93 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(39), one C(4), and one P(2) atom. The C(3)-C(39) bond length is 1.14 Å. The C(3)-C(4) bond length is 1.31 Å. The C(3)-P(2) bond length is 1.78 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(3), one H(4), and one H(5) atom. The C(4)-H(4) bond length is 0.93 Å. The C(4)-H(5) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a 3-coordinate geometry to one C(6), one P(3), and one H(6) atom. The C(5)-C(6) bond length is 1.23 Å. The C(5)-P(3) bond length is 1.77 Å. The C(5)-H(6) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(5), one H(7), and one H(8) atom. The C(6)-H(7) bond length is 0.93 Å. The C(6)-H(8) bond length is 0.93 Å. In the seventh C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(10), one N(1), and one H(12) atom. The C(9)-C(10) bond length is 1.38 Å. The C(9)-N(1) bond length is 1.34 Å. The C(9)-H(12) bond length is 0.93 Å. In the eighth C site, C(10) is bonded in a bent 120 degrees geometry to one C(11) and one C(9) atom. The C(10)-C(11) bond length is 1.40 Å. In the ninth C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(11), and one C(12) atom. The C(11)-C(11) bond length is 1.48 Å. The C(11)-C(12) bond length is 1.38 Å. In the tenth C site, C(12) is bonded in a distorted single-bond geometry to one C(11) and one H(13) atom. The C(12)-H(13) bond length is 0.93 Å. In the eleventh C site, C(13) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(14) atom. The C(13)-N(1) bond length is 1.34 Å. The C(13)-H(14) bond length is 0.93 Å. In the twelfth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one N(2) and one H(15,18) atom. The C(14)-N(2) bond length is 1.33 Å. The C(14)-H(15,18) bond length is 0.93 Å. In the thirteenth C site, C(18) is bonded in a distorted bent 120 degrees geometry to one N(2) and one H(15,18) atom. The C(18)-N(2) bond length is 1.33 Å. The C(18)-H(15,18) bond length is 0.93 Å. In the fourteenth C site, C(19) is bonded in a distorted trigonal planar geometry to one C(20), one N(3), and one H(19) atom. The C(19)-C(20) bond length is 1.38 Å. The C(19)-N(3) bond length is 1.33 Å. The C(19)-H(19) bond length is 0.93 Å. In the fifteenth C site, C(20) is bonded in a single-bond geometry to one C(19), one C(21), and one H(20) atom. The C(20)-C(21) bond length is 1.37 Å. The C(20)-H(20) bond length is 0.93 Å. In the sixteenth C site, C(21) is bonded in a trigonal planar geometry to one C(20), one C(22), and one C(24) atom. The C(21)-C(22) bond length is 1.39 Å. The C(21)-C(24) bond length is 1.50 Å. In the seventeenth C site, C(22) is bonded in a distorted single-bond geometry to one C(21) and one H(21) atom. The C(22)-H(21) bond length is 0.93 Å. In the eighteenth C site, C(23) is bonded in a 2-coordinate geometry to one N(3) and one H(22) atom. The C(23)-N(3) bond length is 1.33 Å. The C(23)-H(22) bond length is 0.93 Å. In the nineteenth C site, C(24) is bonded in a trigonal planar geometry to one C(21), one C(25), and one C(28) atom. The C(24)-C(25) bond length is 1.37 Å. The C(24)-C(28) bond length is 1.37 Å. In the twentieth C site, C(25) is bonded in a distorted single-bond geometry to one C(24), one C(26), and one H(23) atom. The C(25)-C(26) bond length is 1.38 Å. The C(25)-H(23) bond length is 0.93 Å. In the twenty-first C site, C(26) is bonded in a distorted trigonal planar geometry to one C(25), one N(4), and one H(24) atom. The C(26)-N(4) bond length is 1.33 Å. The C(26)-H(24) bond length is 0.93 Å. In the twenty-second C site, C(27) is bonded in a distorted bent 120 degrees geometry to one N(4) and one H(25) atom. The C(27)-N(4) bond length is 1.31 Å. The C(27)-H(25) bond length is 0.93 Å. In the twenty-third C site, C(28) is bonded in a distorted single-bond geometry to one C(24) and one H(26) atom. The C(28)-H(26) bond length is 0.93 Å. In the twenty-fourth C site, C(29) is bonded in a distorted trigonal planar geometry to one C(30), one N(5), and one H(27) atom. The C(29)-C(30) bond length is 1.37 Å. The C(29)-N(5) bond length is 1.34 Å. The C(29)-H(27) bond length is 0.93 Å. In the twenty-fifth C site, C(30) is bonded in a distorted single-bond geometry to one C(29), one C(31), and one H(28) atom. The C(30)-C(31) bond length is 1.40 Å. The C(30)-H(28) bond length is 0.93 Å. In the twenty-sixth C site, C(31) is bonded in a trigonal planar geometry to one C(30), one C(32), and one C(34) atom. The C(31)-C(32) bond length is 1.37 Å. The C(31)-C(34) bond length is 1.48 Å. In the twenty-seventh C site, C(32) is bonded in a distorted single-bond geometry to one C(31) and one H(29) atom. The C(32)-H(29) bond length is 0.93 Å. In the twenty-eighth C site, C(33) is bonded in a distorted bent 120 degrees geometry to one N(5) and one H(30) atom. The C(33)-N(5) bond length is 1.32 Å. The C(33)-H(30) bond length is 0.93 Å. In the twenty-ninth C site, C(34) is bonded in a trigonal planar geometry to one C(31), one C(35), and one C(38) atom. The C(34)-C(35) bond length is 1.36 Å. The C(34)-C(38) bond length is 1.37 Å. In the thirtieth C site, C(35) is bonded in a distorted single-bond geometry to one C(34), one C(36), and one H(31) atom. The C(35)-C(36) bond length is 1.36 Å. The C(35)-H(31) bond length is 0.93 Å. In the thirty-first C site, C(36) is bonded in a distorted trigonal planar geometry to one C(35), one N(6), and one H(32) atom. The C(36)-N(6) bond length is 1.33 Å. The C(36)-H(32) bond length is 0.93 Å. In the thirty-second C site, C(37) is bonded in a distorted trigonal planar geometry to one C(38), one N(6), and one H(33) atom. The C(37)-C(38) bond length is 1.37 Å. The C(37)-N(6) bond length is 1.32 Å. The C(37)-H(33) bond length is 0.93 Å. In the thirty-third C site, C(38) is bonded in a distorted single-bond geometry to one C(34), one C(37), and one H(34) atom. The C(38)-H(34) bond length is 0.93 Å. In the thirty-fourth C site, C(39) is bonded in a distorted bent 120 degrees geometry to one C(3), one H(38), and one H(39) atom. The C(39)-H(38) bond length is 0.93 Å. The C(39)-H(39) bond length is 0.93 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one C(1), one O(1), one O(2), and one O(3) atom to form PCO3 tetrahedra that share  a cornercorner with one Cd(1)N2O3 square pyramid and  a cornercorner with one Cd(2)N2O3 square pyramid. The P(1)-O(1) bond length is 1.52 Å. The P(1)-O(2) bond length is 1.51 Å. The P(1)-O(3) bond length is 1.52 Å. In the second P site, P(2) is bonded to one C(3), one O(4), one O(5), and one O(6) atom to form distorted PCO3 tetrahedra that share  a cornercorner with one Cd(2)N2O3 square pyramid. The P(2)-O(4) bond length is 1.50 Å. The P(2)-O(5) bond length is 1.57 Å. The P(2)-O(6) bond length is 1.49 Å. In the third P site, P(3) is bonded to one C(5), one O(7), one O(8), and one O(9) atom to form PCO3 tetrahedra that share  a cornercorner with one Cd(1)N2O3 square pyramid. The P(3)-O(7) bond length is 1.57 Å. The P(3)-O(8) bond length is 1.50 Å. The P(3)-O(9) bond length is 1.50 Å. In the fourth P site, P(4) is bonded in a distorted trigonal non-coplanar geometry to one O(10), one O(11), and one O(12) atom. The P(4)-O(10) bond length is 1.50 Å. The P(4)-O(11) bond length is 1.49 Å. The P(4)-O(12) bond length is 1.56 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cd(1), one C(13), and one C(9) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Cd(2), one C(14), and one C(18) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one Cd(3), one C(19), and one C(23) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Cd(2), one C(26), and one C(27) atom. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one Cd(4), one C(29), and one C(33) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one Cd(1), one C(36), and one C(37) atom. There are thirty-three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. 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(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(4) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(5) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(6) 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(12) is bonded in a single-bond geometry to one C(9) atom. In the tenth H site, H(13) is bonded in a single-bond geometry to one C(12) atom. In the eleventh H site, H(14) is bonded in a single-bond geometry to one C(13) atom. In the twelfth H site, H(15,18) is bonded in a single-bond geometry to one C(14) atom. In the thirteenth H site, H(19) is bonded in a single-bond geometry to one C(19) atom. In the fourteenth H site, H(20) is bonded in a single-bond geometry to one C(20) atom. In the fifteenth H site, H(21) is bonded in a single-bond geometry to one C(22) atom. In the sixteenth H site, H(22) is bonded in a single-bond geometry to one C(23) atom. In the seventeenth H site, H(23) is bonded in a single-bond geometry to one C(25) atom. In the eighteenth H site, H(24) is bonded in a single-bond geometry to one C(26) atom. In the nineteenth H site, H(25) is bonded in a single-bond geometry to one C(27) atom. In the twentieth H site, H(26) is bonded in a single-bond geometry to one C(28) atom. In the twenty-first H site, H(27) is bonded in a single-bond geometry to one C(29) atom. In the twenty-second H site, H(28) is bonded in a single-bond geometry to one C(30) atom. In the twenty-third H site, H(29) is bonded in a single-bond geometry to one C(32) atom. In the twenty-fourth H site, H(30) is bonded in a single-bond geometry to one C(33) atom. In the twenty-fifth H site, H(31) is bonded in a single-bond geometry to one C(35) atom. In the twenty-sixth H site, H(32) is bonded in a single-bond geometry to one C(36) atom. In the twenty-seventh H site, H(33) is bonded in a single-bond geometry to one C(37) atom. In the twenty-eighth H site, H(34) is bonded in a single-bond geometry to one C(38) atom. In the twenty-ninth H site, H(35) is bonded in a single-bond geometry to one O(1) and one O(5) atom. The H(35)-O(1) bond length is 1.72 Å. The H(35)-O(5) bond length is 0.82 Å. In the thirtieth H site, H(36) is bonded in a single-bond geometry to one O(3) and one O(7) atom. The H(36)-O(3) bond length is 1.69 Å. The H(36)-O(7) bond length is 0.82 Å. In the thirty-first H site, H(37) is bonded in a single-bond geometry to one O(12) atom. The H(37)-O(12) bond length is 0.82 Å. In the thirty-second H site, H(38) is bonded in a single-bond geometry to one C(39) atom. In the thirty-third H site, H(39) is bonded in a single-bond geometry to one C(39) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Cd(2), one P(1), and one H(35) atom. In the second O site, O(2) is bonded in a single-bond geometry to one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Cd(1), one P(1), and one H(36) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cd(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one P(2) and one H(35) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Cd(4) and one P(2) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one P(3) and one H(36) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one Cd(1) and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Cd(3) and one P(3) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Cd(1) and one P(4) atom. In the eleventh O site, O(11) is bonded in a distorted bent 150 degrees geometry to one Cd(2) and one P(4) atom. In the twelfth O site, O(12) is bonded in a water-like geometry to one P(4) and one H(37) atom. Linkers: 5 c1cc(-c2ccncc2)ccn1 ,1 [c]1cnccc1-c1[c]cncc1. Metal clusters: 6 [Cd]. The MOF has largest included sphere 4.27 A, density 1.55 g/cm3, surface area 4124.62 m2/g, accessible volume 0.22 cm3/g