MnH10(C2N)4 crystallizes in the orthorhombic Fmm2 space group. Mn(1,2) is bonded in a tetrahedral geometry to one N(1); one N(4); and two equivalent N(2,5) atoms. The Mn(1,2)-N(1) bond length is 2.06 Å. The Mn(1,2)-N(4) bond length is 2.07 Å. Both Mn(1,2)-N(2,5) bond lengths are 2.06 Å. There are six inequivalent C sites. In the first C site, C(1,4) is bonded in a distorted trigonal planar geometry to one C(11,12,14); one N(1); and one N(6) atom. The C(1,4)-C(11,12,14) bond length is 1.49 Å. The C(1,4)-N(1) bond length is 1.35 Å. The C(1,4)-N(6) bond length is 1.35 Å. In the second C site, C(2,3) is bonded in a distorted trigonal planar geometry to one C(11,12,14) and two equivalent N(2,5) atoms. The C(2,3)-C(11,12,14) bond length is 1.49 Å. Both C(2,3)-N(2,5) bond lengths are 1.35 Å. In the third C site, C(11,12,14) is bonded in a distorted trigonal non-coplanar geometry to one C(1,4); one H(13,14,15,16); and two equivalent H(7,8,9,10,11,12) atoms. The C(11,12,14)-H(13,14,15,16) bond length is 1.10 Å. Both C(11,12,14)-H(7,8,9,10,11,12) bond lengths are 1.10 Å. In the fourth C site, C(13) is bonded in a distorted trigonal non-coplanar geometry to one C(2,3); one H(13,14,15,16); and two equivalent H(7,8,9,10,11,12) atoms. The C(13)-C(2,3) bond length is 1.49 Å. The C(13)-H(13,14,15,16) bond length is 1.10 Å. Both C(13)-H(7,8,9,10,11,12) bond lengths are 1.10 Å. In the fifth C site, C(5,7,8,9,10) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(1,2,5,6) atom. The C(5,7,8,9,10)-N(1) bond length is 1.39 Å. The C(5,7,8,9,10)-H(1,2,5,6) bond length is 1.08 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one N(2,5) and one H(1,2,5,6) atom. The C(6)-N(2,5) bond length is 1.39 Å. The C(6)-H(1,2,5,6) bond length is 1.08 Å. There are five inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Mn(1,2); one C(1,4); and one C(5,7,8,9,10) atom. In the second N site, N(2,5) is bonded in a trigonal planar geometry to one Mn(1,2); one C(2,3); and one C(6) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one Mn(1,2); one C(2,3); and one C(5,7,8,9,10) atom. The N(3)-Mn(1,2) bond length is 2.07 Å. The N(3)-C(2,3) bond length is 1.35 Å. The N(3)-C(5,7,8,9,10) bond length is 1.38 Å. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Mn(1,2); one C(2,3); and one C(5,7,8,9,10) atom. The N(4)-C(2,3) bond length is 1.35 Å. The N(4)-C(5,7,8,9,10) bond length is 1.38 Å. In the fifth N site, N(6) is bonded in a trigonal planar geometry to one Mn(1,2); one C(1,4); and one C(5,7,8,9,10) atom. The N(6)-Mn(1,2) bond length is 2.06 Å. The N(6)-C(5,7,8,9,10) bond length is 1.39 Å. There are four inequivalent H sites. In the first H site, H(13,14,15,16) is bonded in a single-bond geometry to one C(11,12,14) atom. In the second H site, H(7,8,9,10,11,12) is bonded in a single-bond geometry to one C(11,12,14) atom. In the third H site, H(1,2,5,6) is bonded in a single-bond geometry to one C(5,7,8,9,10) atom. In the fourth H site, H(3,4) is bonded in a single-bond geometry to one C(5,7,8,9,10) atom. The H(3,4)-C(5,7,8,9,10) bond length is 1.08 Å. Linkers: 11 CC1=NC=C[N]1 ,1 CC1=N[CH]C=N1. Metal clusters: 6 [Mn]. The MOF has largest included sphere 11.93 A, density 0.81 g/cm3, surface area 5204.25 m2/g, accessible volume 0.73 cm3/g