CuSiC20H16(N2F3)2(CH)8 crystallizes in the tetragonal P4/mcc space group. The structure consists of eight acetylene molecules inside a CuSiC20H16(N2F3)2 framework. In the CuSiC20H16(N2F3)2 framework, Cu(1) is bonded to four equivalent N(1) and two equivalent F(2) atoms to form CuN4F2 octahedra that share corners with two equivalent Si(1)F6 octahedra. The corner-sharing octahedra are not tilted. All Cu(1)-N(1) bond lengths are 2.02 Å. Both Cu(1)-F(2) bond lengths are 2.28 Å. Si(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form SiF6 octahedra that share corners with two equivalent Cu(1)N4F2 octahedra. The corner-sharing octahedra are not tilted. Both Si(1)-F(2) bond lengths are 1.71 Å. All Si(1)-F(1) bond lengths are 1.72 Å. There are three inequivalent C sites. In the first 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(1) bond length is 1.39 Å. The C(2)-C(3) bond length is 1.40 Å. The C(2)-H(2) bond length is 1.09 Å. In the second C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(1), and one H(1) atom. The C(1)-N(1) bond length is 1.35 Å. The C(1)-H(1) bond length is 1.09 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(3) and two equivalent C(2) atoms. The C(3)-C(3) bond length is 1.47 Å. N(1) is bonded in a trigonal planar geometry to one Cu(1) and two equivalent C(1) atoms. There are two 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. There are two inequivalent F sites. In the first F site, F(1) is bonded in a single-bond geometry to one Si(1) atom. In the second F site, F(2) is bonded in a linear geometry to one Cu(1) and one Si(1) atom. Linkers: 3 c1cc(-c2ccncc2)ccn1. Metal clusters: 2 [Cu]. The MOF has largest included sphere 6.48 A, density 1.06 g/cm3, surface area 5485.51 m2/g, accessible volume 0.46 cm3/g