Eu3Zn6C58H36(N4O7)4(C2NH2)2 crystallizes in the orthorhombic Pnma space group. The structure consists of eight n-methyl methanimine molecules inside a Eu3Zn6C58H36(N4O7)4 framework. In the Eu3Zn6C58H36(N4O7)4 framework, there are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to one O(2), one O(3), one O(5), one O(7), and two equivalent O(1) atoms to form distorted EuO6 pentagonal pyramids that share  a cornercorner with one Zn(1)N3O2 trigonal bipyramid and  an edgeedge with one Eu(1)O6 pentagonal pyramid. The Eu(1)-O(2) bond length is 2.50 Å. The Eu(1)-O(3) bond length is 2.22 Å. The Eu(1)-O(5) bond length is 2.26 Å. The Eu(1)-O(7) bond length is 2.31 Å. There is one shorter (2.40 Å) and one longer (2.48 Å) Eu(1)-O(1) bond length. In the second Eu site, Eu(2) is bonded in a 6-coordinate geometry to two equivalent O(11), two equivalent O(13), and two equivalent O(9) atoms. Both Eu(2)-O(11) bond lengths are 2.27 Å. Both Eu(2)-O(13) bond lengths are 2.22 Å. Both Eu(2)-O(9) bond lengths are 2.28 Å. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one N(1), one N(4), one N(8), one O(2), and one O(8) atom to form ZnN3O2 trigonal bipyramids that share  a cornercorner with one Eu(1)O6 pentagonal pyramid. The Zn(1)-N(1) bond length is 2.00 Å. The Zn(1)-N(4) bond length is 2.01 Å. The Zn(1)-N(8) bond length is 2.05 Å. The Zn(1)-O(2) bond length is 2.34 Å. The Zn(1)-O(8) bond length is 2.13 Å. In the second Zn site, Zn(2) is bonded in a see-saw-like geometry to one N(3), one N(5), one O(10), and one O(6) atom. The Zn(2)-N(3) bond length is 2.01 Å. The Zn(2)-N(5) bond length is 2.01 Å. The Zn(2)-O(10) bond length is 2.11 Å. The Zn(2)-O(6) bond length is 2.15 Å. In the third Zn site, Zn(3) is bonded in an octahedral geometry to one N(2), one N(6), one N(7), one O(12), one O(14), and one O(4) atom. The Zn(3)-N(2) bond length is 2.10 Å. The Zn(3)-N(6) bond length is 2.11 Å. The Zn(3)-N(7) bond length is 2.05 Å. The Zn(3)-O(12) bond length is 2.20 Å. The Zn(3)-O(14) bond length is 2.23 Å. The Zn(3)-O(4) bond length is 2.18 Å. There are thirty inequivalent C sites. In the first C site, C(31) is bonded in a trigonal planar geometry to one C(32) and two equivalent N(7) atoms. The C(31)-C(32) bond length is 1.49 Å. Both C(31)-N(7) bond lengths are 1.35 Å. In the second C site, C(32) is bonded in a 6-coordinate geometry to one C(31), two equivalent H(18), two equivalent H(19), and two equivalent H(20) atoms. Both C(32)-H(18) bond lengths are 0.96 Å. Both C(32)-H(19) bond lengths are 0.96 Å. Both C(32)-H(20) bond lengths are 0.96 Å. In the third C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.45 Å. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(2) bond length is 1.27 Å. In the fourth C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one N(1) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-N(1) bond length is 1.39 Å. In the fifth C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one N(2) atom. The C(3)-N(2) bond length is 1.36 Å. In the sixth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(4)-O(3) bond length is 1.26 Å. The C(4)-O(4) bond length is 1.25 Å. In the seventh C site, C(5) is bonded in a distorted trigonal planar geometry to one C(6), one N(1), and one N(2) atom. The C(5)-C(6) bond length is 1.50 Å. The C(5)-N(1) bond length is 1.34 Å. The C(5)-N(2) bond length is 1.34 Å. In the eighth C site, C(6) is bonded in a trigonal non-coplanar geometry to one C(5) and three equivalent H(1,2,3) atoms. All C(6)-H(1,2,3) bond lengths are 0.96 Å. In the ninth C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(5), and one O(6) atom. The C(7)-C(8) bond length is 1.48 Å. The C(7)-O(5) bond length is 1.26 Å. The C(7)-O(6) bond length is 1.26 Å. In the tenth C site, C(8) is bonded in a distorted single-bond geometry to one C(7), one C(9), and one N(3) atom. The C(8)-C(9) bond length is 1.38 Å. The C(8)-N(3) bond length is 1.37 Å. In the eleventh C site, C(9) is bonded in a distorted single-bond geometry to one C(10), one C(8), and one N(4) atom. The C(9)-C(10) bond length is 1.48 Å. The C(9)-N(4) bond length is 1.39 Å. In the twelfth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(7), and one O(8) atom. The C(10)-O(7) bond length is 1.27 Å. The C(10)-O(8) bond length is 1.25 Å. In the thirteenth C site, C(11) is bonded in a distorted trigonal planar geometry to one C(12), one N(3), and one N(4) atom. The C(11)-C(12) bond length is 1.49 Å. The C(11)-N(3) bond length is 1.35 Å. The C(11)-N(4) bond length is 1.34 Å. In the fourteenth C site, C(12) is bonded in a trigonal non-coplanar geometry to one C(11); one H(5); and two equivalent H(4,6) atoms. The C(12)-H(5) bond length is 0.96 Å. Both C(12)-H(4,6) bond lengths are 0.96 Å. In the fifteenth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(14), one O(10), and one O(9) atom. The C(13)-C(14) bond length is 1.47 Å. The C(13)-O(10) bond length is 1.27 Å. The C(13)-O(9) bond length is 1.27 Å. In the sixteenth C site, C(14) is bonded in a 3-coordinate geometry to one C(13), one C(15), and one N(5) atom. The C(14)-C(15) bond length is 1.38 Å. The C(14)-N(5) bond length is 1.39 Å. In the seventeenth C site, C(15) is bonded in a distorted single-bond geometry to one C(14) and one N(6) atom. The C(15)-N(6) bond length is 1.37 Å. In the eighteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(12) atom. The C(16)-O(11) bond length is 1.27 Å. The C(16)-O(12) bond length is 1.26 Å. In the nineteenth C site, C(17) is bonded in a distorted trigonal planar geometry to one C(18), one N(5), and one N(6) atom. The C(17)-C(18) bond length is 1.49 Å. The C(17)-N(5) bond length is 1.36 Å. The C(17)-N(6) bond length is 1.33 Å. In the twentieth C site, C(18) is bonded in a trigonal non-coplanar geometry to one C(17) and three equivalent H(7,8,9) atoms. All C(18)-H(7,8,9) bond lengths are 0.96 Å. In the twenty-first C site, C(19) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(14) atom. The C(19)-O(13) bond length is 1.27 Å. The C(19)-O(14) bond length is 1.27 Å. In the twenty-second C site, C(20) is bonded in a distorted single-bond geometry to one N(7) atom. The C(20)-N(7) bond length is 1.37 Å. In the twenty-third C site, C(21) is bonded in a distorted bent 120 degrees geometry to one N(8) and one H(10) atom. The C(21)-N(8) bond length is 1.34 Å. The C(21)-H(10) bond length is 0.93 Å. In the twenty-fourth C site, C(22) is bonded in a distorted single-bond geometry to one C(23) and one H(11) atom. The C(22)-C(23) bond length is 1.39 Å. The C(22)-H(11) bond length is 0.93 Å. In the twenty-fifth C site, C(23) is bonded in a trigonal planar geometry to one C(22), one C(24), and one C(28) atom. The C(23)-C(24) bond length is 1.40 Å. The C(23)-C(28) bond length is 1.48 Å. In the twenty-sixth C site, C(24) is bonded in a distorted single-bond geometry to one C(23), one C(25), and one H(12) atom. The C(24)-C(25) bond length is 1.37 Å. The C(24)-H(12) bond length is 0.93 Å. In the twenty-seventh C site, C(25) is bonded in a distorted trigonal planar geometry to one C(24), one N(8), and one H(13) atom. The C(25)-N(8) bond length is 1.34 Å. The C(25)-H(13) bond length is 0.93 Å. In the twenty-eighth C site, C(27) is bonded in a distorted single-bond geometry to one C(28) and one H(15) atom. The C(27)-C(28) bond length is 1.40 Å. The C(27)-H(15) bond length is 0.93 Å. In the twenty-ninth C site, C(28) is bonded in a trigonal planar geometry to one C(23), one C(27), and one C(29) atom. The C(28)-C(29) bond length is 1.39 Å. In the thirtieth C site, C(29) is bonded in a distorted single-bond geometry to one C(28) and one H(16) atom. The C(29)-H(16) bond length is 0.93 Å. There are eight inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Zn(1), one C(2), and one C(5) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Zn(3), one C(3), and one C(5) atom. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Zn(2), one C(11), and one C(8) atom. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one Zn(1), one C(11), and one C(9) atom. In the fifth N site, N(5) is bonded in a 3-coordinate geometry to one Zn(2), one C(14), and one C(17) atom. In the sixth N site, N(6) is bonded in a distorted trigonal planar geometry to one Zn(3), one C(15), and one C(17) atom. In the seventh N site, N(7) is bonded in a distorted trigonal planar geometry to one Zn(3), one C(20), and one C(31) atom. In the eighth N site, N(8) is bonded in a trigonal planar geometry to one Zn(1), one C(21), and one C(25) atom. There are thirteen inequivalent H sites. In the first H site, H(1,2,3) is bonded in a single-bond geometry to one C(6) atom. In the second H site, H(4,6) is bonded in a single-bond geometry to one C(12) atom. In the third H site, H(5) is bonded in a single-bond geometry to one C(12) atom. In the fourth H site, H(7,8,9) is bonded in a single-bond geometry to one C(18) atom. In the fifth H site, H(10) is bonded in a single-bond geometry to one C(21) atom. In the sixth H site, H(11) is bonded in a single-bond geometry to one C(22) atom. In the seventh H site, H(12) is bonded in a single-bond geometry to one C(24) atom. In the eighth H site, H(13) is bonded in a single-bond geometry to one C(25) atom. In the ninth H site, H(15) is bonded in a single-bond geometry to one C(27) atom. In the tenth H site, H(16) is bonded in a single-bond geometry to one C(29) atom. In the eleventh H site, H(18) is bonded in a 1-coordinate geometry to one C(32) and one H(19) atom. The H(18)-H(19) bond length is 0.70 Å. In the twelfth H site, H(19) is bonded in a 2-coordinate geometry to one C(32) and one H(18) atom. In the thirteenth H site, H(20) is bonded in a single-bond geometry to one C(32) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Eu(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Eu(1), one Zn(1), and one C(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Eu(1) and one C(4) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Zn(3) and one C(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Eu(1) and one C(7) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Zn(2) and one C(7) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Eu(1) and one C(10) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one C(10) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Eu(2) and one C(13) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Zn(2) and one C(13) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Eu(2) and one C(16) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Zn(3) and one C(16) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Eu(2) and one C(19) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Zn(3) and one C(19) atom. Linkers: 8 CC1=NC(C([O])=O)=C(C([O])=O)[N]1 ,16 CC1=N[C](C([O])=O)C(C([O])=O)=N1 ,2 [CH3].[H].[H].[H].[O]C(=O)[C]1N=[C]N=C1C([O])=O ,1 [CH3].[H].[H].[H].[O]C(=O)C1=N[C]N=C1C([O])=O ,1 [CH3].[H].[H].[H].[O]C(=O)C1=C(C([O])=O)N=[C][N]1. Metal clusters: 12 [Eu] ,24 [Zn]. The MOF has largest included sphere 7.32 A, density 1.66 g/cm3, surface area 3258.35 m2/g, accessible volume 0.32 cm3/g