Sc3(ReSi2)2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 6-coordinate geometry to one Re(1), two equivalent Re(2), one Si(1), one Si(2), one Si(3), one Si(4), and two equivalent Si(5) atoms. In the second Sc site, Sc(2) is bonded in a 10-coordinate geometry to two equivalent Re(1), three equivalent Re(2), one Si(1), one Si(2), one Si(4), one Si(5), and two equivalent Si(3) atoms. In the third Sc site, Sc(3) is bonded in a 9-coordinate geometry to one Re(2), two equivalent Re(1), one Si(1), one Si(2), one Si(3), two equivalent Si(4), and three equivalent Si(5) atoms. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded in a 13-coordinate geometry to one Sc(1), two equivalent Sc(2), two equivalent Sc(3), two equivalent Re(1), two equivalent Si(3), two equivalent Si(4), and two equivalent Si(5) atoms. In the second Re site, Re(2) is bonded in a 12-coordinate geometry to one Sc(3), two equivalent Sc(1), three equivalent Sc(2), one Re(2), one Si(1), one Si(2), one Si(4), and two equivalent Si(3) atoms. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded in a 10-coordinate geometry to two equivalent Sc(1), two equivalent Sc(2), two equivalent Sc(3), two equivalent Re(2), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 10-coordinate geometry to two equivalent Sc(1), two equivalent Sc(2), two equivalent Sc(3), two equivalent Re(2), and two equivalent Si(1) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to one Sc(1), one Sc(3), two equivalent Sc(2), two equivalent Re(1), two equivalent Re(2), and one Si(4) atom. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to one Sc(1), one Sc(2), two equivalent Sc(3), one Re(2), two equivalent Re(1), one Si(3), and one Si(5) atom. In the fifth Si site, Si(5) is bonded in a 9-coordinate geometry to one Sc(2), two equivalent Sc(1), three equivalent Sc(3), two equivalent Re(1), and one Si(4) atom.
Sc3(ReSi2)2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 6-coordinate geometry to one Re(1), two equivalent Re(2), one Si(1), one Si(2), one Si(3), one Si(4), and two equivalent Si(5) atoms. The Sc(1)-Re(1) bond length is 2.96 Å. There is one shorter (3.01 Å) and one longer (3.22 Å) Sc(1)-Re(2) bond length. The Sc(1)-Si(1) bond length is 2.73 Å. The Sc(1)-Si(2) bond length is 2.79 Å. The Sc(1)-Si(3) bond length is 2.72 Å. The Sc(1)-Si(4) bond length is 2.58 Å. There is one shorter (2.79 Å) and one longer (2.83 Å) Sc(1)-Si(5) bond length. In the second Sc site, Sc(2) is bonded in a 10-coordinate geometry to two equivalent Re(1), three equivalent Re(2), one Si(1), one Si(2), one Si(4), one Si(5), and two equivalent Si(3) atoms. There is one shorter (2.85 Å) and one longer (3.32 Å) Sc(2)-Re(1) bond length. There are a spread of Sc(2)-Re(2) bond distances ranging from 3.10-3.19 Å. The Sc(2)-Si(1) bond length is 2.95 Å. The Sc(2)-Si(2) bond length is 2.90 Å. The Sc(2)-Si(4) bond length is 2.80 Å. The Sc(2)-Si(5) bond length is 2.77 Å. There is one shorter (2.85 Å) and one longer (2.87 Å) Sc(2)-Si(3) bond length. In the third Sc site, Sc(3) is bonded in a 9-coordinate geometry to one Re(2), two equivalent Re(1), one Si(1), one Si(2), one Si(3), two equivalent Si(4), and three equivalent Si(5) atoms. The Sc(3)-Re(2) bond length is 3.30 Å. There is one shorter (2.97 Å) and one longer (3.36 Å) Sc(3)-Re(1) bond length. The Sc(3)-Si(1) bond length is 2.94 Å. The Sc(3)-Si(2) bond length is 2.92 Å. The Sc(3)-Si(3) bond length is 2.80 Å. There is one shorter (2.83 Å) and one longer (2.85 Å) Sc(3)-Si(4) bond length. There are a spread of Sc(3)-Si(5) bond distances ranging from 2.84-3.07 Å. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded in a 13-coordinate geometry to one Sc(1), two equivalent Sc(2), two equivalent Sc(3), two equivalent Re(1), two equivalent Si(3), two equivalent Si(4), and two equivalent Si(5) atoms. Both Re(1)-Re(1) bond lengths are 2.78 Å. There is one shorter (2.48 Å) and one longer (2.65 Å) Re(1)-Si(3) bond length. There is one shorter (2.45 Å) and one longer (2.55 Å) Re(1)-Si(4) bond length. There is one shorter (2.50 Å) and one longer (2.70 Å) Re(1)-Si(5) bond length. In the second Re site, Re(2) is bonded in a 12-coordinate geometry to one Sc(3), two equivalent Sc(1), three equivalent Sc(2), one Re(2), one Si(1), one Si(2), one Si(4), and two equivalent Si(3) atoms. The Re(2)-Re(2) bond length is 3.04 Å. The Re(2)-Si(1) bond length is 2.44 Å. The Re(2)-Si(2) bond length is 2.50 Å. The Re(2)-Si(4) bond length is 2.47 Å. There is one shorter (2.44 Å) and one longer (2.56 Å) Re(2)-Si(3) bond length. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded in a 10-coordinate geometry to two equivalent Sc(1), two equivalent Sc(2), two equivalent Sc(3), two equivalent Re(2), and two equivalent Si(2) atoms. There is one shorter (2.50 Å) and one longer (2.86 Å) Si(1)-Si(2) bond length. In the second Si site, Si(2) is bonded in a 10-coordinate geometry to two equivalent Sc(1), two equivalent Sc(2), two equivalent Sc(3), two equivalent Re(2), and two equivalent Si(1) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to one Sc(1), one Sc(3), two equivalent Sc(2), two equivalent Re(1), two equivalent Re(2), and one Si(4) atom. The Si(3)-Si(4) bond length is 2.45 Å. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to one Sc(1), one Sc(2), two equivalent Sc(3), one Re(2), two equivalent Re(1), one Si(3), and one Si(5) atom. The Si(4)-Si(5) bond length is 2.48 Å. In the fifth Si site, Si(5) is bonded in a 9-coordinate geometry to one Sc(2), two equivalent Sc(1), three equivalent Sc(3), two equivalent Re(1), and one Si(4) atom.