Zn(C3H3N2)2 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a tetrahedral geometry to one N(1), one N(3), one N(5), and one N(8) atom. The Zn(1)-N(1) bond length is 2.00 Å. The Zn(1)-N(3) bond length is 1.99 Å. The Zn(1)-N(5) bond length is 2.00 Å. The Zn(1)-N(8) bond length is 1.99 Å. In the second Zn site, Zn(2) is bonded in a tetrahedral geometry to one N(11), one N(2), one N(6), and one N(7) atom. The Zn(2)-N(11) bond length is 1.99 Å. The Zn(2)-N(2) bond length is 2.00 Å. The Zn(2)-N(6) bond length is 2.00 Å. The Zn(2)-N(7) bond length is 1.99 Å. In the third Zn site, Zn(3) is bonded in a tetrahedral geometry to one N(10), one N(12), one N(4), and one N(9) atom. The Zn(3)-N(10) bond length is 2.00 Å. The Zn(3)-N(12) bond length is 2.00 Å. The Zn(3)-N(4) bond length is 1.99 Å. The Zn(3)-N(9) bond length is 2.00 Å. There are nineteen inequivalent C sites. In the first C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(11), one N(7), and one H(12) atom. The C(12)-C(11) bond length is 1.38 Å. The C(12)-N(7) bond length is 1.38 Å. The C(12)-H(12) bond length is 1.09 Å. In the second C site, C(13) is bonded in a trigonal planar geometry to one N(10), one N(9), and one H(13) atom. The C(13)-N(10) bond length is 1.35 Å. The C(13)-N(9) bond length is 1.35 Å. The C(13)-H(13) bond length is 1.09 Å. In the third C site, C(14) is bonded in a distorted bent 120 degrees geometry to one C(15), one N(10), and one H(14) atom. The C(14)-C(15) bond length is 1.38 Å. The C(14)-N(10) bond length is 1.38 Å. The C(14)-H(14) bond length is 1.09 Å. In the fourth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one C(14), one N(9), and one H(15) atom. The C(15)-N(9) bond length is 1.38 Å. The C(15)-H(15) bond length is 1.09 Å. In the fifth C site, C(16) is bonded in a trigonal planar geometry to two equivalent N(11) and one H(16) atom. Both C(16)-N(11) bond lengths are 1.35 Å. The C(16)-H(16) bond length is 1.09 Å. In the sixth C site, C(17) is bonded in a distorted bent 120 degrees geometry to one N(11) and one H(17) atom. The C(17)-N(11) bond length is 1.38 Å. The C(17)-H(17) bond length is 1.09 Å. In the seventh C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(1) atom. The C(1)-N(1) bond length is 1.35 Å. The C(1)-N(2) bond length is 1.35 Å. The C(1)-H(1) bond length is 1.09 Å. In the eighth C site, C(18) is bonded in a trigonal planar geometry to two equivalent N(12) and one H(18) atom. Both C(18)-N(12) bond lengths are 1.35 Å. The C(18)-H(18) bond length is 1.09 Å. In the ninth C site, C(2) is bonded in a distorted bent 120 degrees geometry to one N(2) and one H(2) atom. The C(2)-N(2) bond length is 1.38 Å. The C(2)-H(2) bond length is 1.08 Å. In the tenth C site, C(19) is bonded in a distorted bent 120 degrees geometry to one N(12) and one H(19) atom. The C(19)-N(12) bond length is 1.38 Å. The C(19)-H(19) bond length is 1.08 Å. In the eleventh C site, C(3) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(3) atom. The C(3)-N(1) bond length is 1.38 Å. The C(3)-H(3) bond length is 1.08 Å. In the twelfth C site, C(4) is bonded in a trigonal planar geometry to one N(3), one N(4), and one H(4) atom. The C(4)-N(3) bond length is 1.35 Å. The C(4)-N(4) bond length is 1.35 Å. The C(4)-H(4) bond length is 1.09 Å. In the thirteenth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one N(4) and one H(5) atom. The C(5)-N(4) bond length is 1.38 Å. The C(5)-H(5) bond length is 1.09 Å. In the fourteenth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one N(3) and one H(6) atom. The C(6)-N(3) bond length is 1.38 Å. The C(6)-H(6) bond length is 1.09 Å. In the fifteenth C site, C(7) is bonded in a trigonal planar geometry to one N(5), one N(6), and one H(7) atom. The C(7)-N(5) bond length is 1.35 Å. The C(7)-N(6) bond length is 1.35 Å. The C(7)-H(7) bond length is 1.09 Å. In the sixteenth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(9), one N(6), and one H(8) atom. The C(8)-C(9) bond length is 1.38 Å. The C(8)-N(6) bond length is 1.38 Å. The C(8)-H(8) bond length is 1.08 Å. In the seventeenth C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(12), one N(8), and one H(11) atom. The C(11)-N(8) bond length is 1.38 Å. The C(11)-H(11) bond length is 1.08 Å. In the eighteenth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(8), one N(5), and one H(9) atom. The C(9)-N(5) bond length is 1.38 Å. The C(9)-H(9) bond length is 1.08 Å. In the nineteenth C site, C(10) is bonded in a trigonal planar geometry to one N(7), one N(8), and one H(10) atom. The C(10)-N(7) bond length is 1.35 Å. The C(10)-N(8) bond length is 1.35 Å. The C(10)-H(10) bond length is 1.09 Å. There are twelve inequivalent N sites. In the first N site, N(10) is bonded in a trigonal planar geometry to one Zn(3), one C(13), and one C(14) atom. In the second N site, N(11) is bonded in a trigonal planar geometry to one Zn(2), one C(16), and one C(17) atom. In the third N site, N(12) is bonded in a trigonal planar geometry to one Zn(3), one C(18), and one C(19) atom. In the fourth N site, N(1) is bonded in a trigonal planar geometry to one Zn(1), one C(1), and one C(3) atom. In the fifth N site, N(2) is bonded in a trigonal planar geometry to one Zn(2), one C(1), and one C(2) atom. In the sixth N site, N(3) is bonded in a trigonal planar geometry to one Zn(1), one C(4), and one C(6) atom. In the seventh N site, N(4) is bonded in a trigonal planar geometry to one Zn(3), one C(4), and one C(5) atom. In the eighth N site, N(5) is bonded in a trigonal planar geometry to one Zn(1), one C(7), and one C(9) atom. In the ninth N site, N(6) is bonded in a trigonal planar geometry to one Zn(2), one C(7), and one C(8) atom. In the tenth N site, N(9) is bonded in a trigonal planar geometry to one Zn(3), one C(13), and one C(15) atom. In the eleventh N site, N(7) is bonded in a trigonal planar geometry to one Zn(2), one C(10), and one C(12) atom. In the twelfth N site, N(8) is bonded in a trigonal planar geometry to one Zn(1), one C(10), and one C(11) atom. There are nineteen inequivalent H sites. In the first H site, H(14) is bonded in a single-bond geometry to one C(14) atom. In the second H site, H(15) is bonded in a single-bond geometry to one C(15) atom. In the third H site, H(16) is bonded in a single-bond geometry to one C(16) atom. In the fourth H site, H(17) is bonded in a single-bond geometry to one C(17) atom. In the fifth H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the sixth H site, H(18) is bonded in a single-bond geometry to one C(18) atom. In the seventh H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the eighth H site, H(19) is bonded in a single-bond geometry to one C(19) atom. In the ninth H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the tenth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the eleventh H site, H(5) is bonded in a single-bond geometry to one C(5) atom. In the twelfth H site, H(6) is bonded in a single-bond geometry to one C(6) atom. In the thirteenth H site, H(7) is bonded in a single-bond geometry to one C(7) atom. In the fourteenth H site, H(8) is bonded in a single-bond geometry to one C(8) atom. In the fifteenth H site, H(9) is bonded in a single-bond geometry to one C(9) atom. In the sixteenth H site, H(10) is bonded in a single-bond geometry to one C(10) atom. In the seventeenth H site, H(11) is bonded in a single-bond geometry to one C(11) atom. In the eighteenth H site, H(12) is bonded in a single-bond geometry to one C(12) atom. In the nineteenth H site, H(13) is bonded in a single-bond geometry to one C(13) atom. Linkers: 31 C1=CN=C[N]1 ,17 [CH]1C=NC=N1. Metal clusters: 24 [Zn]. The MOF has largest included sphere 11.73 A, density 0.83 g/cm3, surface area 4833.84 m2/g, accessible volume 0.82 cm3/g