Zn(C3H3N2)2 crystallizes in the orthorhombic Pbca space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a tetrahedral geometry to one N(1), one N(2), one N(5), and one N(7) atom. The Zn(1)-N(1) bond length is 2.00 Å. The Zn(1)-N(2) bond length is 2.00 Å. The Zn(1)-N(5) bond length is 2.00 Å. The Zn(1)-N(7) bond length is 1.99 Å. In the second Zn site, Zn(2) is bonded in a tetrahedral geometry to one N(3), one N(4), one N(6), and one N(8) atom. The Zn(2)-N(3) bond length is 2.00 Å. The Zn(2)-N(4) bond length is 2.00 Å. The Zn(2)-N(6) bond length is 1.98 Å. The Zn(2)-N(8) bond length is 2.01 Å. There are twelve inequivalent C sites. In the first 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 second C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(6), one N(3), and one H(4) atom. The C(4)-C(6) bond length is 1.38 Å. The C(4)-N(3) bond length is 1.38 Å. The C(4)-H(4) bond length is 1.08 Å. In the third C site, C(5) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(5) atom. The C(5)-N(1) bond length is 1.35 Å. The C(5)-N(2) bond length is 1.35 Å. The C(5)-H(5) bond length is 1.09 Å. In the fourth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(4), one N(4), and one H(6) atom. The C(6)-N(4) bond length is 1.38 Å. The C(6)-H(6) bond length is 1.08 Å. In the fifth C site, C(7) is bonded in a trigonal planar geometry to one N(7), one N(8), and one H(7) atom. The C(7)-N(7) bond length is 1.35 Å. The C(7)-N(8) bond length is 1.35 Å. The C(7)-H(7) bond length is 1.09 Å. In the sixth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one N(2) and one H(8) atom. The C(8)-N(2) bond length is 1.38 Å. The C(8)-H(8) bond length is 1.08 Å. In the seventh C site, C(9) is bonded in a distorted bent 120 degrees geometry to 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 eighth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one N(8) and one H(10) atom. The C(10)-N(8) bond length is 1.38 Å. The C(10)-H(10) bond length is 1.08 Å. In the ninth C site, C(11) is bonded in a distorted bent 120 degrees geometry to one N(6) and one H(11) atom. The C(11)-N(6) bond length is 1.38 Å. The C(11)-H(11) bond length is 1.08 Å. In the tenth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one N(7) and one H(12) atom. The C(12)-N(7) bond length is 1.38 Å. The C(12)-H(12) bond length is 1.08 Å. In the eleventh C site, C(1) is bonded in a trigonal planar geometry to one N(5), one N(6), and one H(1) atom. The C(1)-N(5) bond length is 1.35 Å. The C(1)-N(6) bond length is 1.35 Å. The C(1)-H(1) bond length is 1.09 Å. In the twelfth C site, C(2) is bonded in a trigonal planar geometry to one N(3), one N(4), and one H(2) atom. The C(2)-N(3) bond length is 1.35 Å. The C(2)-N(4) bond length is 1.35 Å. The C(2)-H(2) bond length is 1.09 Å. There are eight inequivalent N sites. In the first N site, N(7) is bonded in a trigonal planar geometry to one Zn(1), one C(12), and one C(7) atom. In the second N site, N(8) is bonded in a trigonal planar geometry to one Zn(2), one C(10), and one C(7) atom. In the third N site, N(1) is bonded in a trigonal planar geometry to one Zn(1), one C(3), and one C(5) atom. In the fourth N site, N(2) is bonded in a trigonal planar geometry to one Zn(1), one C(5), and one C(8) atom. In the fifth N site, N(3) is bonded in a trigonal planar geometry to one Zn(2), one C(2), and one C(4) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one Zn(2), one C(1), and one C(11) atom. In the seventh N site, N(4) is bonded in a trigonal planar geometry to one Zn(2), one C(2), and one C(6) atom. In the eighth N site, N(5) is bonded in a trigonal planar geometry to one Zn(1), one C(1), and one C(9) atom. There are twelve 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(3) 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(5) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(6) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(7) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(8) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(9) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(10) 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. Linkers: 9 [CH]1C=NC=N1 ,23 C1=CN=C[N]1. Metal clusters: 16 [Zn]. The MOF has largest included sphere 6.15 A, density 0.94 g/cm3, surface area 4755.47 m2/g, accessible volume 0.64 cm3/g