Cu2SiH16(C7N4)4 crystallizes in the cubic Ia-3d space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted T-shaped geometry to three equivalent N(1) atoms. All Cu(1)-N(1) bond lengths are 2.01 Å. In the second Cu site, Cu(2) is bonded in an octahedral geometry to six equivalent N(2) atoms. All Cu(2)-N(2) bond lengths are 2.17 Å. Si(1) is bonded in a tetrahedral geometry to four equivalent C(5) atoms. All Si(1)-C(5) bond lengths are 1.84 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted water-like geometry to one C(2), one N(3), and one N(4) atom. The C(1)-C(2) bond length is 1.44 Å. The C(1)-N(3) bond length is 1.34 Å. The C(1)-N(4) bond length is 1.33 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-C(7) bond length is 1.39 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(4), and one H(1) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-H(1) bond length is 0.95 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(2) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(2) bond length is 0.95 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one Si(1), one C(4), and one C(6) atom. The C(5)-C(6) bond length is 1.39 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(5), one C(7), and one H(3) atom. The C(6)-C(7) bond length is 1.39 Å. The C(6)-H(3) bond length is 0.95 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one H(4) atom. The C(7)-H(4) bond length is 0.95 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Cu(1), one N(2), and one N(4) atom. The N(1)-N(2) bond length is 1.34 Å. The N(1)-N(4) bond length is 1.36 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Cu(2), one N(1), and one N(3) atom. The N(2)-N(3) bond length is 1.32 Å. In the third N site, N(3) is bonded in a water-like geometry to one C(1) and one N(2) atom. In the fourth N site, N(4) is bonded in a distorted single-bond geometry to one C(1) and one N(1) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(7) atom. Linkers: 8 c1cc([Si](c2ccc(C3=NN=N[N]3)cc2)(c2ccc(C3=NN=N[N]3)cc2)c2ccc(C3=N[N]N=N3)cc2)ccc1C1=NN=N[N]1 ,9 c1cc([Si](c2ccc(C3=NN=N[N]3)cc2)(c2ccc(C3=NN=N[N]3)cc2)c2ccc(C3=NN=N[N]3)cc2)ccc1C1=NN=N[N]1 ,8 c1cc([Si](c2ccc(C3=NN=N[N]3)cc2)(c2ccc(C3=N[N]N=N3)cc2)c2ccc(C3=N[N]N=N3)cc2)ccc1C1=NN=N[N]1. Metal clusters: 16 N1=N[Cu]234(N=N[Cu]1N=N2)N=N[Cu](N=N3)N=N4. The MOF has largest included sphere 10.14 A, density 0.62 g/cm3, surface area 4235.71 m2/g, accessible volume 1.17 cm3/g