Mn4Si2C56N32H32Cl crystallizes in the tetragonal P4_2/mnm space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to four equivalent N(3) and one Cl(1) atom to form corner-sharing MnN4Cl square pyramids. All Mn(1)-N(3) bond lengths are 2.22 Å. The Mn(1)-Cl(1) bond length is 2.75 Å. In the second Mn site, Mn(2) is bonded to four equivalent N(4) and one Cl(1) atom to form corner-sharing MnN4Cl square pyramids. All Mn(2)-N(4) bond lengths are 2.20 Å. The Mn(2)-Cl(1) bond length is 2.70 Å. Si(1) is bonded in a tetrahedral geometry to four equivalent C(6) atoms. All Si(1)-C(6) bond lengths are 1.86 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(7), one N(1), and one N(2) atom. The C(1)-C(7) bond length is 1.48 Å. The C(1)-N(1) bond length is 1.35 Å. The C(1)-N(2) bond length is 1.30 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(3), one C(6), and one H(4) atom. The C(2)-C(3) bond length is 1.38 Å. The C(2)-C(6) bond length is 1.38 Å. The C(2)-H(4) bond length is 0.95 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(7), and one H(2) atom. The C(3)-C(7) bond length is 1.39 Å. The C(3)-H(2) bond length is 0.95 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(5), one C(6), and one H(3) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-C(6) bond length is 1.39 Å. The C(4)-H(3) bond length is 0.95 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one C(7), and one H(1) atom. The C(5)-C(7) bond length is 1.38 Å. The C(5)-H(1) bond length is 0.95 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one Si(1), one C(2), and one C(4) atom. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(5) atom. There are four inequivalent N sites. In the first N site, N(1) is bonded in a water-like geometry to one C(1) and one N(3) atom. The N(1)-N(3) bond length is 1.35 Å. In the second N site, N(2) is bonded in a water-like geometry to one C(1) and one N(4) atom. The N(2)-N(4) bond length is 1.34 Å. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Mn(1), one N(1), and one N(4) atom. The N(3)-N(4) bond length is 1.33 Å. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one Mn(2), one N(2), and one N(3) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) 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(2) atom. Cl(1) is bonded in a square co-planar geometry to two equivalent Mn(1) and two equivalent Mn(2) atoms. Linkers: 2 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 ,1 c1cc([Si](c2ccc(C3=N[N]N=N3)cc2)(c2ccc(C3=N[N]N=N3)cc2)c2ccc(C3=N[N]N=N3)cc2)ccc1C1=NN=N[N]1 ,1 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: 1 Cl[Mn]123N=N[Mn@]4(=N[N][Mn@@]5(=NN=[Mn@@](N=N5)(N=N1)N=N2)N=N4)N=N3 ,1 Cl[Mn]123N=N[Mn@]4(=N[N][Mn@]5(=NN=[Mn@@](N=N5)(N=N1)N=N2)N=N4)N=N3. The MOF has largest included sphere 15.71 A, density 0.54 g/cm3, surface area 4208.74 m2/g, accessible volume 1.48 cm3/g