CdH20(C13N3)2 crystallizes in the trigonal R-3 space group. Cd(1) is bonded in a square co-planar geometry to two equivalent N(1) and two equivalent N(2) atoms. Both Cd(1)-N(1) bond lengths are 2.19 Å. Both Cd(1)-N(2) bond lengths are 2.20 Å. There are thirteen inequivalent C sites. In the first C site, C(13) is bonded in a distorted trigonal planar geometry to one C(12), one C(6), and one N(3) atom. The C(13)-C(12) bond length is 1.41 Å. The C(13)-C(6) bond length is 1.41 Å. The C(13)-N(3) bond length is 1.46 Å. In the second C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one N(1), and one H(1) atom. The C(1)-C(2) bond length is 1.41 Å. The C(1)-N(1) bond length is 1.36 Å. The C(1)-H(1) bond length is 1.08 Å. In the third C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one H(2) atom. The C(2)-C(3) bond length is 1.41 Å. The C(2)-H(2) bond length is 1.08 Å. In the fourth C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(4), and one N(3) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-N(3) bond length is 1.47 Å. In the fifth C site, C(4) is bonded in a distorted single-bond geometry to one C(3) and one H(3) atom. The C(4)-H(3) bond length is 1.08 Å. In the sixth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(4) atom. The C(5)-N(1) bond length is 1.37 Å. The C(5)-H(4) bond length is 1.08 Å. In the seventh C site, C(6) is bonded in a distorted trigonal planar geometry to one C(12), one C(13), and one H(5) atom. The C(6)-C(12) bond length is 1.41 Å. The C(6)-H(5) bond length is 1.08 Å. In the eighth C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8), one N(2), and one H(6) atom. The C(7)-C(8) bond length is 1.41 Å. The C(7)-N(2) bond length is 1.36 Å. The C(7)-H(6) bond length is 1.08 Å. In the ninth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(7), one C(9), and one H(7) atom. The C(8)-C(9) bond length is 1.41 Å. The C(8)-H(7) bond length is 1.08 Å. In the tenth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(10), one C(8), and one N(3) atom. The C(9)-C(10) bond length is 1.41 Å. The C(9)-N(3) bond length is 1.47 Å. In the eleventh C site, C(10) is bonded in a distorted single-bond geometry to one C(11), one C(9), and one H(8) atom. The C(10)-C(11) bond length is 1.41 Å. The C(10)-H(8) bond length is 1.08 Å. In the twelfth C site, C(11) is bonded in a distorted trigonal planar geometry to one C(10), one N(2), and one H(9) atom. The C(11)-N(2) bond length is 1.37 Å. The C(11)-H(9) bond length is 1.08 Å. In the thirteenth C site, C(12) is bonded in a distorted trigonal planar geometry to one C(13), one C(6), and one H(10) atom. The C(12)-H(10) bond length is 1.08 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cd(1), one C(1), and one C(5) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Cd(1), one C(11), and one C(7) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one C(13), one C(3), and one C(9) atom. There are ten 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(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(7) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(8) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(10) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(11) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(12) atom. Linkers: 3 c1cc(N(c2ccncc2)c2ccc(N(c3ccncc3)c3ccncc3)cc2)ccn1. Metal clusters: 3 [Cd]. The MOF has largest included sphere 11.24 A, density 0.60 g/cm3, surface area 4707.03 m2/g, accessible volume 1.23 cm3/g