Sc19(RuBr7)4 crystallizes in the trigonal R3m space group. There are six inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 6-coordinate geometry to one Ru(1), one Br(1), two equivalent Br(3), and two equivalent Br(6) atoms. In the second Sc site, Sc(2) is bonded in a 6-coordinate geometry to one Ru(2), one Br(2), two equivalent Br(3), and two equivalent Br(8) atoms. In the third Sc site, Sc(3) is bonded in a 6-coordinate geometry to one Ru(2), one Br(1), one Br(2), one Br(3), one Br(7), and one Br(8) atom. In the fourth Sc site, Sc(4) is bonded to three equivalent Ru(2) and three equivalent Br(2) atoms to form edge-sharing ScRu3Br3 octahedra. In the fifth Sc site, Sc(5) is bonded to one Ru(1), two equivalent Ru(2), one Br(1), and two equivalent Br(3) atoms to form edge-sharing ScRu3Br3 octahedra. In the sixth Sc site, Sc(6) is bonded to one Br(4), one Br(7), two equivalent Br(5), and two equivalent Br(8) atoms to form edge-sharing ScBr6 octahedra. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to three equivalent Sc(1) and three equivalent Sc(5) atoms to form distorted edge-sharing RuSc6 octahedra. In the second Ru site, Ru(2) is bonded to one Sc(2), one Sc(4), two equivalent Sc(3), and two equivalent Sc(5) atoms to form distorted edge-sharing RuSc6 octahedra. There are eight inequivalent Br sites. In the first Br site, Br(8) is bonded in a distorted T-shaped geometry to one Sc(2), one Sc(3), and one Sc(6) atom. In the second Br site, Br(1) is bonded in a distorted see-saw-like geometry to one Sc(1), one Sc(5), and two equivalent Sc(3) atoms. In the third Br site, Br(2) is bonded in a distorted see-saw-like geometry to one Sc(2), one Sc(4), and two equivalent Sc(3) atoms. In the fourth Br site, Br(3) is bonded in a distorted see-saw-like geometry to one Sc(1), one Sc(2), one Sc(3), and one Sc(5) atom. In the fifth Br site, Br(4) is bonded in a distorted T-shaped geometry to three equivalent Sc(6) atoms. In the sixth Br site, Br(5) is bonded in an L-shaped geometry to two equivalent Sc(6) atoms. In the seventh Br site, Br(6) is bonded in a distorted L-shaped geometry to two equivalent Sc(1) atoms. In the eighth Br site, Br(7) is bonded in a distorted T-shaped geometry to one Sc(6) and two equivalent Sc(3) atoms.
Sc19(RuBr7)4 crystallizes in the trigonal R3m space group. There are six inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 6-coordinate geometry to one Ru(1), one Br(1), two equivalent Br(3), and two equivalent Br(6) atoms. The Sc(1)-Ru(1) bond length is 2.58 Å. The Sc(1)-Br(1) bond length is 3.15 Å. Both Sc(1)-Br(3) bond lengths are 2.84 Å. Both Sc(1)-Br(6) bond lengths are 2.68 Å. In the second Sc site, Sc(2) is bonded in a 6-coordinate geometry to one Ru(2), one Br(2), two equivalent Br(3), and two equivalent Br(8) atoms. The Sc(2)-Ru(2) bond length is 2.54 Å. The Sc(2)-Br(2) bond length is 3.19 Å. Both Sc(2)-Br(3) bond lengths are 2.78 Å. Both Sc(2)-Br(8) bond lengths are 2.84 Å. In the third Sc site, Sc(3) is bonded in a 6-coordinate geometry to one Ru(2), one Br(1), one Br(2), one Br(3), one Br(7), and one Br(8) atom. The Sc(3)-Ru(2) bond length is 2.53 Å. The Sc(3)-Br(1) bond length is 2.80 Å. The Sc(3)-Br(2) bond length is 2.83 Å. The Sc(3)-Br(3) bond length is 3.18 Å. The Sc(3)-Br(7) bond length is 2.84 Å. The Sc(3)-Br(8) bond length is 2.82 Å. In the fourth Sc site, Sc(4) is bonded to three equivalent Ru(2) and three equivalent Br(2) atoms to form edge-sharing ScRu3Br3 octahedra. All Sc(4)-Ru(2) bond lengths are 2.68 Å. All Sc(4)-Br(2) bond lengths are 2.90 Å. In the fifth Sc site, Sc(5) is bonded to one Ru(1), two equivalent Ru(2), one Br(1), and two equivalent Br(3) atoms to form edge-sharing ScRu3Br3 octahedra. The Sc(5)-Ru(1) bond length is 2.66 Å. Both Sc(5)-Ru(2) bond lengths are 2.69 Å. The Sc(5)-Br(1) bond length is 2.93 Å. Both Sc(5)-Br(3) bond lengths are 2.92 Å. In the sixth Sc site, Sc(6) is bonded to one Br(4), one Br(7), two equivalent Br(5), and two equivalent Br(8) atoms to form edge-sharing ScBr6 octahedra. The Sc(6)-Br(4) bond length is 2.77 Å. The Sc(6)-Br(7) bond length is 2.78 Å. Both Sc(6)-Br(5) bond lengths are 2.66 Å. Both Sc(6)-Br(8) bond lengths are 2.79 Å. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to three equivalent Sc(1) and three equivalent Sc(5) atoms to form distorted edge-sharing RuSc6 octahedra. In the second Ru site, Ru(2) is bonded to one Sc(2), one Sc(4), two equivalent Sc(3), and two equivalent Sc(5) atoms to form distorted edge-sharing RuSc6 octahedra. There are eight inequivalent Br sites. In the first Br site, Br(8) is bonded in a distorted T-shaped geometry to one Sc(2), one Sc(3), and one Sc(6) atom. In the second Br site, Br(1) is bonded in a distorted see-saw-like geometry to one Sc(1), one Sc(5), and two equivalent Sc(3) atoms. In the third Br site, Br(2) is bonded in a distorted see-saw-like geometry to one Sc(2), one Sc(4), and two equivalent Sc(3) atoms. In the fourth Br site, Br(3) is bonded in a distorted see-saw-like geometry to one Sc(1), one Sc(2), one Sc(3), and one Sc(5) atom. In the fifth Br site, Br(4) is bonded in a distorted T-shaped geometry to three equivalent Sc(6) atoms. In the sixth Br site, Br(5) is bonded in an L-shaped geometry to two equivalent Sc(6) atoms. In the seventh Br site, Br(6) is bonded in a distorted L-shaped geometry to two equivalent Sc(1) atoms. In the eighth Br site, Br(7) is bonded in a distorted T-shaped geometry to one Sc(6) and two equivalent Sc(3) atoms.