K2FeH20(C6S)4 crystallizes in the triclinic P1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one S(1), one S(3), one S(6), and one S(8) atom. The K(1)-S(1) bond length is 3.29 Å. The K(1)-S(3) bond length is 3.57 Å. The K(1)-S(6) bond length is 3.29 Å. The K(1)-S(8) bond length is 3.57 Å. In the second K site, K(2) is bonded in a 4-coordinate geometry to one S(2), one S(4), one S(5), and one S(7) atom. The K(2)-S(2) bond length is 3.29 Å. The K(2)-S(4) bond length is 3.56 Å. The K(2)-S(5) bond length is 3.29 Å. The K(2)-S(7) bond length is 3.56 Å. In the third K site, K(3) is bonded in a 4-coordinate geometry to one S(2), one S(3), one S(6), and one S(7) atom. The K(3)-S(2) bond length is 3.57 Å. The K(3)-S(3) bond length is 3.28 Å. The K(3)-S(6) bond length is 3.56 Å. The K(3)-S(7) bond length is 3.30 Å. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to one S(1), one S(4), one S(5), and one S(8) atom. The K(4)-S(1) bond length is 3.56 Å. The K(4)-S(4) bond length is 3.28 Å. The K(4)-S(5) bond length is 3.56 Å. The K(4)-S(8) bond length is 3.30 Å. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a tetrahedral geometry to one S(1), one S(2), one S(3), and one S(4) atom. The Fe(1)-S(1) bond length is 2.29 Å. The Fe(1)-S(2) bond length is 2.29 Å. The Fe(1)-S(3) bond length is 2.29 Å. The Fe(1)-S(4) bond length is 2.29 Å. In the second Fe site, Fe(2) is bonded in a tetrahedral geometry to one S(5), one S(6), one S(7), and one S(8) atom. The Fe(2)-S(5) bond length is 2.29 Å. The Fe(2)-S(6) bond length is 2.29 Å. The Fe(2)-S(7) bond length is 2.29 Å. The Fe(2)-S(8) bond length is 2.29 Å. There are thirty-five inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(41,47); one C(9); and one S(1) atom. The C(1)-C(41,47) bond length is 1.41 Å. The C(1)-C(9) bond length is 1.41 Å. The C(1)-S(1) bond length is 1.77 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(10); one C(42,48); and one S(2) atom. The C(2)-C(10) bond length is 1.41 Å. The C(2)-C(42,48) bond length is 1.41 Å. The C(2)-S(2) bond length is 1.77 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(11), one C(43), and one S(3) atom. The C(3)-C(11) bond length is 1.41 Å. The C(3)-C(43) bond length is 1.41 Å. The C(3)-S(3) bond length is 1.77 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(12,13,14); one C(44,45,46); and one S(4) atom. The C(4)-C(12,13,14) bond length is 1.41 Å. The C(4)-C(44,45,46) bond length is 1.41 Å. The C(4)-S(4) bond length is 1.77 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(12,13,14); one C(44,45,46); and one S(5) atom. The C(5)-C(12,13,14) bond length is 1.41 Å. The C(5)-C(44,45,46) bond length is 1.41 Å. The C(5)-S(5) bond length is 1.77 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(12,13,14); one C(44,45,46); and one S(6) atom. The C(6)-C(12,13,14) bond length is 1.41 Å. The C(6)-C(44,45,46) bond length is 1.41 Å. The C(6)-S(6) bond length is 1.77 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(15); one C(41,47); and one S(7) atom. The C(7)-C(15) bond length is 1.41 Å. The C(7)-C(41,47) bond length is 1.41 Å. The C(7)-S(7) bond length is 1.77 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(16); one C(42,48); and one S(8) atom. The C(8)-C(16) bond length is 1.41 Å. The C(8)-C(42,48) bond length is 1.41 Å. The C(8)-S(8) bond length is 1.77 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(1), one C(17), and one H(1) atom. The C(9)-C(17) bond length is 1.40 Å. The C(9)-H(1) bond length is 1.09 Å. In the tenth C site, C(10) is bonded in a distorted single-bond geometry to one C(18), one C(2), and one H(2) atom. The C(10)-C(18) bond length is 1.40 Å. The C(10)-H(2) bond length is 1.09 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(19), one C(3), and one H(3) atom. The C(11)-C(19) bond length is 1.40 Å. The C(11)-H(3) bond length is 1.09 Å. In the twelfth C site, C(12,13,14) is bonded in a distorted single-bond geometry to one C(20), one C(4), and one H(4) atom. The C(12,13,14)-C(20) bond length is 1.40 Å. The C(12,13,14)-H(4) bond length is 1.09 Å. In the thirteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(23), one C(7), and one H(7) atom. The C(15)-C(23) bond length is 1.40 Å. The C(15)-H(7) bond length is 1.09 Å. In the fourteenth C site, C(16) is bonded in a distorted single-bond geometry to one C(24), one C(8), and one H(8) atom. The C(16)-C(24) bond length is 1.40 Å. The C(16)-H(8) bond length is 1.09 Å. In the fifteenth C site, C(17) is bonded in a distorted trigonal planar geometry to one C(25,32); one C(9); and one H(9,16) atom. The C(17)-C(25,32) bond length is 1.40 Å. The C(17)-H(9,16) bond length is 1.09 Å. In the sixteenth C site, C(18) is bonded in a distorted trigonal planar geometry to one C(10), one C(26), and one H(10) atom. The C(18)-C(26) bond length is 1.40 Å. The C(18)-H(10) bond length is 1.09 Å. In the seventeenth C site, C(19) is bonded in a distorted trigonal planar geometry to one C(11), one C(27), and one H(11) atom. The C(19)-C(27) bond length is 1.40 Å. The C(19)-H(11) bond length is 1.09 Å. In the eighteenth C site, C(20) is bonded in a distorted trigonal planar geometry to one C(12,13,14); one C(28,29,30); and one H(12,13,14) atom. The C(20)-C(28,29,30) bond length is 1.40 Å. The C(20)-H(12,13,14) bond length is 1.09 Å. In the nineteenth C site, C(21) is bonded in a distorted trigonal planar geometry to one C(12,13,14); one C(28,29,30); and one H(12,13,14) atom. The C(21)-C(12,13,14) bond length is 1.40 Å. The C(21)-C(28,29,30) bond length is 1.40 Å. The C(21)-H(12,13,14) bond length is 1.09 Å. In the twentieth C site, C(22) is bonded in a distorted trigonal planar geometry to one C(12,13,14); one C(28,29,30); and one H(12,13,14) atom. The C(22)-C(12,13,14) bond length is 1.40 Å. The C(22)-C(28,29,30) bond length is 1.40 Å. The C(22)-H(12,13,14) bond length is 1.09 Å. In the twenty-first C site, C(23) is bonded in a distorted trigonal planar geometry to one C(15), one C(31), and one H(15) atom. The C(23)-C(31) bond length is 1.40 Å. The C(23)-H(15) bond length is 1.09 Å. In the twenty-second C site, C(24) is bonded in a distorted trigonal planar geometry to one C(16); one C(25,32); and one H(9,16) atom. The C(24)-C(25,32) bond length is 1.40 Å. The C(24)-H(9,16) bond length is 1.09 Å. In the twenty-third C site, C(25,32) is bonded in a distorted trigonal planar geometry to one C(17); one C(33,38,39); and one H(17,22,23) atom. The C(25,32)-C(33,38,39) bond length is 1.40 Å. The C(25,32)-H(17,22,23) bond length is 1.09 Å. In the twenty-fourth C site, C(26) is bonded in a distorted trigonal planar geometry to one C(18); one C(34,40); and one H(18,24) atom. The C(26)-C(34,40) bond length is 1.40 Å. The C(26)-H(18,24) bond length is 1.09 Å. In the twenty-fifth C site, C(27) is bonded in a distorted trigonal planar geometry to one C(19), one C(35), and one H(19) atom. The C(27)-C(35) bond length is 1.40 Å. The C(27)-H(19) bond length is 1.09 Å. In the twenty-sixth C site, C(28,29,30) is bonded in a distorted trigonal planar geometry to one C(20); one C(36,37); and one H(20,21) atom. The C(28,29,30)-C(36,37) bond length is 1.40 Å. The C(28,29,30)-H(20,21) bond length is 1.09 Å. In the twenty-seventh C site, C(31) is bonded in a distorted trigonal planar geometry to one C(23); one C(33,38,39); and one H(17,22,23) atom. The C(31)-C(33,38,39) bond length is 1.40 Å. The C(31)-H(17,22,23) bond length is 1.09 Å. In the twenty-eighth C site, C(33,38,39) is bonded in a distorted single-bond geometry to one C(25,32) and one H(25,27,32) atom. The C(33,38,39)-H(25,27,32) bond length is 1.09 Å. In the twenty-ninth C site, C(34,40) is bonded in a distorted single-bond geometry to one C(26) and one H(26) atom. The C(34,40)-H(26) bond length is 1.09 Å. In the thirtieth C site, C(35) is bonded in a distorted single-bond geometry to one C(27) and one H(25,27,32) atom. The C(35)-H(25,27,32) bond length is 1.09 Å. In the thirty-first C site, C(36,37) is bonded in a distorted single-bond geometry to one C(28,29,30) and one H(28,29,30,31) atom. The C(36,37)-H(28,29,30,31) bond length is 1.09 Å. In the thirty-second C site, C(41,47) is bonded in a distorted single-bond geometry to one C(1) and one H(33,40) atom. The C(41,47)-H(33,40) bond length is 1.09 Å. In the thirty-third C site, C(42,48) is bonded in a distorted single-bond geometry to one C(2) and one H(34,36) atom. The C(42,48)-H(34,36) bond length is 1.09 Å. In the thirty-fourth C site, C(43) is bonded in a distorted single-bond geometry to one C(3) and one H(35) atom. The C(43)-H(35) bond length is 1.09 Å. In the thirty-fifth C site, C(44,45,46) is bonded in a distorted single-bond geometry to one C(4) and one H(34,36) atom. The C(44,45,46)-H(34,36) bond length is 1.09 Å. There are twenty-six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(9) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(10) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(11) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(12,13,14) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(12,13,14) atom. The H(5)-C(12,13,14) bond length is 1.09 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(12,13,14) atom. The H(6)-C(12,13,14) bond length is 1.09 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(15) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(16) atom. In the ninth H site, H(9,16) is bonded in a single-bond geometry to one C(17) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(18) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(19) atom. In the twelfth H site, H(12,13,14) is bonded in a single-bond geometry to one C(20) atom. In the thirteenth H site, H(15) is bonded in a single-bond geometry to one C(23) atom. In the fourteenth H site, H(17,22,23) is bonded in a single-bond geometry to one C(25,32) atom. In the fifteenth H site, H(18,24) is bonded in a single-bond geometry to one C(26) atom. In the sixteenth H site, H(19) is bonded in a single-bond geometry to one C(27) atom. In the seventeenth H site, H(20,21) is bonded in a single-bond geometry to one C(28,29,30) atom. In the eighteenth H site, H(25,27,32) is bonded in a single-bond geometry to one C(33,38,39) atom. In the nineteenth H site, H(26) is bonded in a single-bond geometry to one C(34,40) atom. In the twentieth H site, H(28,29,30,31) is bonded in a single-bond geometry to one C(36,37) atom. In the twenty-first H site, H(33,40) is bonded in a single-bond geometry to one C(41,47) atom. In the twenty-second H site, H(34,36) is bonded in a single-bond geometry to one C(42,48) atom. In the twenty-third H site, H(35) is bonded in a single-bond geometry to one C(43) atom. In the twenty-fourth H site, H(37) is bonded in a single-bond geometry to one C(44,45,46) atom. The H(37)-C(44,45,46) bond length is 1.09 Å. In the twenty-fifth H site, H(38) is bonded in a single-bond geometry to one C(44,45,46) atom. The H(38)-C(44,45,46) bond length is 1.09 Å. In the twenty-sixth H site, H(39) is bonded in a single-bond geometry to one C(41,47) atom. The H(39)-C(41,47) bond length is 1.09 Å. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a 4-coordinate geometry to one K(1), one K(4), one Fe(1), and one C(1) atom. In the second S site, S(2) is bonded in a 4-coordinate geometry to one K(2), one K(3), one Fe(1), and one C(2) atom. In the third S site, S(3) is bonded in a 4-coordinate geometry to one K(1), one K(3), one Fe(1), and one C(3) atom. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one K(2), one K(4), one Fe(1), and one C(4) atom. In the fifth S site, S(5) is bonded in a 4-coordinate geometry to one K(2), one K(4), one Fe(2), and one C(5) atom. In the sixth S site, S(6) is bonded in a 4-coordinate geometry to one K(1), one K(3), one Fe(2), and one C(6) atom. In the seventh S site, S(7) is bonded in a 4-coordinate geometry to one K(2), one K(3), one Fe(2), and one C(7) atom. In the eighth S site, S(8) is bonded in a 4-coordinate geometry to one K(1), one K(4), one Fe(2), and one C(8) atom. Linkers: 8 [S]c1ccccc1. Metal clusters: 4 [K] ,2 [Fe]. The MOF has largest included sphere 2.43 A, density 1.47 g/cm3, surface area 3851.34 m2/g, accessible volume 0.14 cm3/g