EuH6(C2O)6C5H2(C4H3SC2H4)2 is Indium-derived structured and crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of one 2,3,4,5-tetramethyl-1,3,5-hexatriene molecule; two C4H3SC2H4 clusters; and one EuH6(C2O)6 cluster. In one of the C4H3SC2H4 clusters, there are six inequivalent C sites. In the first C site, C(12) is bonded in a single-bond geometry to one C(13) and one H(6) atom. The C(12)-C(13) bond length is 1.41 Å. The C(12)-H(6) bond length is 0.95 Å. In the second C site, C(13) is bonded in a trigonal planar geometry to one C(12), one C(14), and one C(16) atom. The C(13)-C(14) bond length is 1.37 Å. The C(13)-C(16) bond length is 1.51 Å. In the third C site, C(14) is bonded in a distorted single-bond geometry to one C(13) and one H(7) atom. The C(14)-H(7) bond length is 0.95 Å. In the fourth C site, C(16) is bonded in a trigonal planar geometry to one C(13), one C(16), and one C(17) atom. The C(16)-C(16) bond length is 1.28 Å. The C(16)-C(17) bond length is 1.51 Å. In the fifth C site, C(17) is bonded in a water-like geometry to one C(16), one H(10), one H(9), and one S(1) atom. The C(17)-H(10) bond length is 0.99 Å. The C(17)-H(9) bond length is 0.99 Å. The C(17)-S(1) bond length is 1.79 Å. In the sixth C site, C(18) is bonded in a trigonal non-coplanar geometry to one H(11), one H(12), one H(13), and one S(1) atom. The C(18)-H(11) bond length is 0.98 Å. The C(18)-H(12) bond length is 0.98 Å. The C(18)-H(13) bond length is 0.98 Å. The C(18)-S(1) bond length is 1.69 Å. There are seven inequivalent H sites. In the first H site, H(6) is bonded in a single-bond geometry to one C(12) atom. In the second H site, H(7) is bonded in a single-bond geometry to one C(14) atom. In the third H site, H(9) is bonded in a single-bond geometry to one C(17) atom. In the fourth H site, H(10) is bonded in a single-bond geometry to one C(17) atom. In the fifth H site, H(11) is bonded in a single-bond geometry to one C(18) atom. In the sixth H site, H(12) is bonded in a single-bond geometry to one C(18) atom. In the seventh H site, H(13) is bonded in a single-bond geometry to one C(18) atom. S(1) is bonded in a water-like geometry to one C(17) and one C(18) atom. In one of the C4H3SC2H4 clusters, there are six inequivalent C sites. In the first C site, C(22) is bonded in a distorted single-bond geometry to one C(23) and one H(15,16) atom. The C(22)-C(23) bond length is 1.40 Å. The C(22)-H(15,16) bond length is 0.95 Å. In the second C site, C(23) is bonded in a trigonal planar geometry to one C(22), one C(24), and one C(26) atom. The C(23)-C(24) bond length is 1.39 Å. The C(23)-C(26) bond length is 1.49 Å. In the third C site, C(24) is bonded in a distorted single-bond geometry to one C(23) and one H(15,16) atom. The C(24)-H(15,16) bond length is 0.95 Å. In the fourth C site, C(26) is bonded in a trigonal planar geometry to one C(23), one C(26), and one C(27) atom. The C(26)-C(26) bond length is 1.33 Å. The C(26)-C(27) bond length is 1.49 Å. In the fifth C site, C(27) is bonded in a water-like geometry to one C(26); two equivalent H(18,19); and one S(2) atom. Both C(27)-H(18,19) bond lengths are 0.99 Å. The C(27)-S(2) bond length is 1.79 Å. In the sixth C site, C(28) is bonded in a trigonal non-coplanar geometry to one H(20), one H(21), one H(22), and one S(2) atom. The C(28)-H(20) bond length is 0.97 Å. The C(28)-H(21) bond length is 0.98 Å. The C(28)-H(22) bond length is 0.99 Å. The C(28)-S(2) bond length is 1.69 Å. There are five inequivalent H sites. In the first H site, H(15,16) is bonded in a single-bond geometry to one C(22) atom. In the second H site, H(18,19) is bonded in a single-bond geometry to one C(27) atom. In the third H site, H(20) is bonded in a single-bond geometry to one C(28) atom. In the fourth H site, H(21) is bonded in a single-bond geometry to one C(28) atom. In the fifth H site, H(22) is bonded in a single-bond geometry to one C(28) atom. S(2) is bonded in an L-shaped geometry to one C(27) and one C(28) atom. In the EuH6(C2O)6 cluster, Eu(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), and two equivalent O(3) atoms. The Eu(1)-O(1) bond length is 2.45 Å. The Eu(1)-O(2) bond length is 2.48 Å. The Eu(1)-O(4) bond length is 2.42 Å. The Eu(1)-O(5) bond length is 2.48 Å. The Eu(1)-O(6) bond length is 2.44 Å. There is one shorter (2.42 Å) and one longer (2.65 Å) Eu(1)-O(3) bond length. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.49 Å. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.25 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 1.38 Å. In the third C site, C(3) is bonded in a single-bond geometry to one C(2) and one H(1) atom. The C(3)-H(1) bond length is 0.95 Å. In the fourth C site, C(7) is bonded in a distorted single-bond geometry to one C(2) and one H(4) atom. The C(7)-H(4) bond length is 0.95 Å. In the fifth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(3), and one O(4) atom. The C(9)-C(10) bond length is 1.48 Å. The C(9)-O(3) bond length is 1.28 Å. The C(9)-O(4) bond length is 1.24 Å. In the sixth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(15), and one C(9) atom. The C(10)-C(11) bond length is 1.39 Å. The C(10)-C(15) bond length is 1.39 Å. In the seventh C site, C(11) is bonded in a distorted single-bond geometry to one C(10) and one H(5) atom. The C(11)-H(5) bond length is 0.95 Å. In the eighth C site, C(15) is bonded in a distorted single-bond geometry to one C(10) and one H(8) atom. The C(15)-H(8) bond length is 0.95 Å. In the ninth C site, C(19) is bonded in a distorted bent 120 degrees geometry to one C(20), one O(5), and one O(6) atom. The C(19)-C(20) bond length is 1.48 Å. The C(19)-O(5) bond length is 1.24 Å. The C(19)-O(6) bond length is 1.28 Å. In the tenth C site, C(20) is bonded in a trigonal planar geometry to one C(19), one C(21), and one C(25) atom. The C(20)-C(21) bond length is 1.39 Å. The C(20)-C(25) bond length is 1.40 Å. In the eleventh C site, C(21) is bonded in a distorted single-bond geometry to one C(20) and one H(14,17) atom. The C(21)-H(14,17) bond length is 0.95 Å. In the twelfth C site, C(25) is bonded in a distorted single-bond geometry to one C(20) and one H(14,17) atom. The C(25)-H(14,17) bond length is 0.95 Å. There are five 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(4) is bonded in a single-bond geometry to one C(7) atom. In the third H site, H(5) is bonded in a single-bond geometry to one C(11) atom. In the fourth H site, H(8) is bonded in a single-bond geometry to one C(15) atom. In the fifth H site, H(14,17) is bonded in a single-bond geometry to one C(21) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted L-shaped geometry to one Eu(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Eu(1) and one C(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Eu(1) and one C(9) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Eu(1) and one C(9) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Eu(1) and one C(19) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Eu(1) and one C(19) atom. Linkers: 2 [C]/C(=C(/[C])c1ccc(C([O])=O)cc1)c1ccc([C]=O)cc1 ,1 [C]/C(=C(/[C])c1ccc(C([O])=O)cc1)c1ccc(C([O])=O)cc1 ,2 CSC/C(=C(/CSC)c1ccc(C([O])=O)cc1)c1ccc(C([O])=O)cc1. Metal clusters: 1 [C]1O[Eu]23(O1)(O[C]O2)O[C]O[Eu]12(O[C]O1)(O[C]O2)O[C]O3. RCSR code: pcu. The MOF has largest included sphere 5.14 A, density 1.26 g/cm3, surface area 4511.55 m2/g, accessible volume 0.35 cm3/g