NaBH7(C2N3)3 crystallizes in the cubic P4_332 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted octahedral geometry to six equivalent N(1) atoms. All Na(1)-N(1) bond lengths are 2.49 Å. In the second Na site, Na(2) is bonded in an octahedral geometry to six equivalent N(3) atoms. All Na(2)-N(3) bond lengths are 2.51 Å. B(1) is bonded in a tetrahedral geometry to three equivalent N(2) and one H(3) atom. All B(1)-N(2) bond lengths are 1.55 Å. The B(1)-H(3) bond length is 1.21 Å. There are two inequivalent C sites. In the first C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(1), one N(2), and one H(2) atom. The C(2)-C(1) bond length is 1.38 Å. The C(2)-N(2) bond length is 1.36 Å. The C(2)-H(2) bond length is 1.08 Å. In the second C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(3), and one H(1) atom. The C(1)-N(3) bond length is 1.36 Å. The C(1)-H(1) bond length is 1.08 Å. There are three inequivalent N sites. In the first N site, N(3) is bonded in a distorted trigonal non-coplanar geometry to one Na(2), one C(1), and one N(1) atom. The N(3)-N(1) bond length is 1.32 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one B(1), one C(2), and one N(1) atom. The N(2)-N(1) bond length is 1.35 Å. In the third N site, N(1) is bonded in a trigonal planar geometry to one Na(1), one N(2), and one N(3) atom. There are three inequivalent H sites. In the first H site, H(3) is bonded in a single-bond geometry to one B(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(1) is bonded in a single-bond geometry to one C(1) atom. Linkers: 8 n1ccn(n1)[BH](n1ccnn1)n1ccnn1. Metal clusters: 8 [Na]. The MOF has largest included sphere 3.31 A, density 1.40 g/cm3, surface area 4343.51 m2/g, accessible volume 0.16 cm3/g