HoZnC12H11(N2O5)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 8-coordinate geometry to one O(1), one O(13), one O(17), one O(19), one O(7), one O(9), and two equivalent O(5) atoms. The Ho(1)-O(1) bond length is 2.20 Å. The Ho(1)-O(13) bond length is 2.31 Å. The Ho(1)-O(17) bond length is 2.44 Å. The Ho(1)-O(19) bond length is 2.32 Å. The Ho(1)-O(7) bond length is 2.47 Å. The Ho(1)-O(9) bond length is 2.25 Å. There is one shorter (2.37 Å) and one longer (2.53 Å) Ho(1)-O(5) bond length. In the second Ho site, Ho(2) is bonded in a 8-coordinate geometry to one O(10), one O(14), one O(18), one O(2), one O(20), one O(8), and two equivalent O(6) atoms. The Ho(2)-O(10) bond length is 2.25 Å. The Ho(2)-O(14) bond length is 2.31 Å. The Ho(2)-O(18) bond length is 2.45 Å. The Ho(2)-O(2) bond length is 2.20 Å. The Ho(2)-O(20) bond length is 2.32 Å. The Ho(2)-O(8) bond length is 2.47 Å. There is one shorter (2.37 Å) and one longer (2.53 Å) Ho(2)-O(6) bond length. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted octahedral geometry to one N(1), one N(5), one N(8), one O(11), one O(16), and one O(3) atom. The Zn(1)-N(1) bond length is 2.07 Å. The Zn(1)-N(5) bond length is 2.03 Å. The Zn(1)-N(8) bond length is 2.10 Å. The Zn(1)-O(11) bond length is 2.37 Å. The Zn(1)-O(16) bond length is 2.22 Å. The Zn(1)-O(3) bond length is 2.22 Å. In the second Zn site, Zn(2) is bonded in a distorted octahedral geometry to one N(2), one N(6), one N(7), one O(12), one O(15), and one O(4) atom. The Zn(2)-N(2) bond length is 2.07 Å. The Zn(2)-N(6) bond length is 2.03 Å. The Zn(2)-N(7) bond length is 2.10 Å. The Zn(2)-O(12) bond length is 2.37 Å. The Zn(2)-O(15) bond length is 2.22 Å. The Zn(2)-O(4) bond length is 2.22 Å. There are twenty 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(3) atom. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(3) bond length is 1.26 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. The C(2)-O(2) bond length is 1.28 Å. The C(2)-O(4) bond length is 1.26 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(5) and one N(1) atom. The C(3)-C(5) bond length is 1.40 Å. The C(3)-N(1) bond length is 1.37 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(6) and one N(2) atom. The C(4)-C(6) bond length is 1.39 Å. The C(4)-N(2) bond length is 1.38 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(3); one C(7,8); and one N(3) atom. The C(5)-C(7,8) bond length is 1.46 Å. The C(5)-N(3) bond length is 1.39 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(4); one C(7,8); and one N(4) atom. The C(6)-C(7,8) bond length is 1.46 Å. The C(6)-N(4) bond length is 1.39 Å. In the seventh C site, C(7,8) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(5), and one O(7) atom. The C(7,8)-O(5) bond length is 1.28 Å. The C(7,8)-O(7) bond length is 1.28 Å. In the eighth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(11), one N(1), and one N(3) atom. The C(9)-C(11) bond length is 1.48 Å. The C(9)-N(1) bond length is 1.34 Å. The C(9)-N(3) bond length is 1.35 Å. In the ninth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(12), one N(2), and one N(4) atom. The C(10)-C(12) bond length is 1.48 Å. The C(10)-N(2) bond length is 1.34 Å. The C(10)-N(4) bond length is 1.35 Å. In the tenth C site, C(11) is bonded in a distorted trigonal non-coplanar geometry to one C(9), one H(11), one H(13), and one H(15) atom. The C(11)-H(11) bond length is 1.09 Å. The C(11)-H(13) bond length is 1.10 Å. The C(11)-H(15) bond length is 1.10 Å. In the eleventh C site, C(12) is bonded in a distorted trigonal non-coplanar geometry to one C(10), one H(12), one H(14), and one H(16) atom. The C(12)-H(12) bond length is 1.10 Å. The C(12)-H(14) bond length is 1.10 Å. The C(12)-H(16) bond length is 1.10 Å. In the twelfth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(15), one O(11), and one O(9) atom. The C(13)-C(15) bond length is 1.47 Å. The C(13)-O(11) bond length is 1.27 Å. The C(13)-O(9) bond length is 1.29 Å. In the thirteenth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one C(16), one O(10), and one O(12) atom. The C(14)-C(16) bond length is 1.47 Å. The C(14)-O(10) bond length is 1.29 Å. The C(14)-O(12) bond length is 1.27 Å. In the fourteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(13); one C(17,18); and one N(5) atom. The C(15)-C(17,18) bond length is 1.40 Å. The C(15)-N(5) bond length is 1.37 Å. In the fifteenth C site, C(16) is bonded in a distorted single-bond geometry to one C(14); one C(17,18); and one N(6) atom. The C(16)-C(17,18) bond length is 1.40 Å. The C(16)-N(6) bond length is 1.37 Å. In the sixteenth C site, C(17,18) is bonded in a distorted single-bond geometry to one C(15) and one N(7) atom. The C(17,18)-N(7) bond length is 1.38 Å. In the seventeenth C site, C(19) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(15) atom. The C(19)-O(13) bond length is 1.29 Å. The C(19)-O(15) bond length is 1.27 Å. In the eighteenth C site, C(20) is bonded in a distorted bent 120 degrees geometry to one O(14) and one O(16) atom. The C(20)-O(14) bond length is 1.29 Å. The C(20)-O(16) bond length is 1.27 Å. In the nineteenth C site, C(21,22) is bonded in a distorted trigonal planar geometry to one C(23,24); one N(5); and one N(7) atom. The C(21,22)-C(23,24) bond length is 1.49 Å. The C(21,22)-N(5) bond length is 1.35 Å. The C(21,22)-N(7) bond length is 1.35 Å. In the twentieth C site, C(23,24) is bonded in a distorted trigonal non-coplanar geometry to one C(21,22); one H(17,18); one H(19,20); and one H(21,22) atom. The C(23,24)-H(17,18) bond length is 1.09 Å. The C(23,24)-H(19,20) bond length is 1.09 Å. The C(23,24)-H(21,22) bond length is 1.10 Å. There are eight inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Zn(1), one C(3), and one C(9) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Zn(2), one C(10), and one C(4) atom. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one C(5), one C(9), and one H(9) atom. The N(3)-H(9) bond length is 1.05 Å. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one C(10), one C(6), and one H(10) atom. The N(4)-H(10) bond length is 1.05 Å. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one Zn(1); one C(15); and one C(21,22) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one Zn(2); one C(16); and one C(21,22) atom. The N(6)-C(21,22) bond length is 1.35 Å. In the seventh N site, N(7) is bonded in a distorted trigonal planar geometry to one Zn(2); one C(17,18); and one C(21,22) atom. In the eighth N site, N(8) is bonded in a distorted trigonal planar geometry to one Zn(1); one C(17,18); and one C(21,22) atom. The N(8)-C(17,18) bond length is 1.38 Å. The N(8)-C(21,22) bond length is 1.35 Å. There are nineteen inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(17) atom. The H(1)-O(17) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(18) atom. The H(2)-O(18) bond length is 0.99 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(17) atom. The H(3)-O(17) bond length is 0.98 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(18) atom. The H(4)-O(18) bond length is 0.98 Å. In the fifth H site, H(5) is bonded in a distorted single-bond geometry to one O(13) and one O(19) atom. The H(5)-O(13) bond length is 1.66 Å. The H(5)-O(19) bond length is 1.01 Å. In the sixth H site, H(6) is bonded in a distorted single-bond geometry to one O(14) and one O(20) atom. The H(6)-O(14) bond length is 1.66 Å. The H(6)-O(20) bond length is 1.01 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(19) atom. The H(7)-O(19) bond length is 0.97 Å. In the eighth H site, H(8) is bonded in a single-bond geometry to one O(20) atom. The H(8)-O(20) bond length is 0.97 Å. In the ninth H site, H(9) is bonded in a single-bond geometry to one N(3) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one N(4) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(11) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(12) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one C(11) atom. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one C(12) atom. In the fifteenth H site, H(15) is bonded in a single-bond geometry to one C(11) atom. In the sixteenth H site, H(16) is bonded in a single-bond geometry to one C(12) atom. In the seventeenth H site, H(17,18) is bonded in a single-bond geometry to one C(23,24) atom. In the eighteenth H site, H(19,20) is bonded in a single-bond geometry to one C(23,24) atom. In the nineteenth H site, H(21,22) is bonded in a single-bond geometry to one C(23,24) atom. There are twenty inequivalent O sites. In the first O site, O(7) is bonded in a distorted single-bond geometry to one Ho(1) and one C(7,8) atom. In the second O site, O(8) is bonded in a distorted single-bond geometry to one Ho(2) and one C(7,8) atom. The O(8)-C(7,8) bond length is 1.28 Å. In the third O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Ho(1) and one C(13) atom. In the fourth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Ho(2) and one C(14) atom. In the fifth O site, O(11) is bonded in a distorted single-bond geometry to one Zn(1) and one C(13) atom. In the sixth O site, O(12) is bonded in a distorted single-bond geometry to one Zn(2) and one C(14) atom. In the seventh O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one Ho(1), one C(19), and one H(5) atom. In the eighth O site, O(14) is bonded in a distorted trigonal non-coplanar geometry to one Ho(2), one C(20), and one H(6) atom. In the ninth O site, O(15) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(19) atom. In the tenth O site, O(16) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(20) atom. In the eleventh O site, O(17) is bonded in a distorted trigonal non-coplanar geometry to one Ho(1), one H(1), and one H(3) atom. In the twelfth O site, O(18) is bonded in a distorted trigonal non-coplanar geometry to one Ho(2), one H(2), and one H(4) atom. In the thirteenth O site, O(19) is bonded in a distorted water-like geometry to one Ho(1), one H(5), and one H(7) atom. In the fourteenth O site, O(20) is bonded in a distorted water-like geometry to one Ho(2), one H(6), and one H(8) atom. In the fifteenth O site, O(1) is bonded in a bent 150 degrees geometry to one Ho(1) and one C(1) atom. In the sixteenth O site, O(2) is bonded in a bent 150 degrees geometry to one Ho(2) and one C(2) atom. In the seventeenth O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(1) atom. In the eighteenth O site, O(4) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(2) atom. In the nineteenth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Ho(1) and one C(7,8) atom. In the twentieth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Ho(2) and one C(7,8) atom. The O(6)-C(7,8) bond length is 1.28 Å. Linkers: 4 Cc1nc(C([O])=O)c(C([O])=O)[nH]1 ,3 CC1=NC(C([O])=O)=C(C([O])=O)[N]1 ,1 CC1=N[C](C([O])=O)C(C([O])=O)=N1. Metal clusters: 4 [Ho] ,4 [Zn]. The MOF has largest included sphere 4.68 A, density 2.11 g/cm3, surface area 2758.44 m2/g, accessible volume 0.13 cm3/g