Nd4(SBr2)3 crystallizes in the monoclinic C2/c space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(2), one Br(2), and three equivalent Br(1) atoms. In the second Nd site, Nd(2) is bonded in a 7-coordinate geometry to two equivalent S(1), two equivalent Br(2), and three equivalent Br(3) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Nd(1) and two equivalent Nd(2) atoms to form a mixture of edge and corner-sharing SNd4 tetrahedra. In the second S site, S(2) is bonded to four equivalent Nd(1) atoms to form a mixture of edge and corner-sharing SNd4 tetrahedra. There are three inequivalent Br sites. In the first Br site, Br(1) is bonded in a 2-coordinate geometry to three equivalent Nd(1) atoms. In the second Br site, Br(2) is bonded in a distorted trigonal planar geometry to one Nd(1) and two equivalent Nd(2) atoms. In the third Br site, Br(3) is bonded in a distorted T-shaped geometry to three equivalent Nd(2) atoms.
Nd4(SBr2)3 crystallizes in the monoclinic C2/c space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(2), one Br(2), and three equivalent Br(1) atoms. There is one shorter (2.87 Å) and one longer (2.88 Å) Nd(1)-S(1) bond length. There is one shorter (2.82 Å) and one longer (2.83 Å) Nd(1)-S(2) bond length. The Nd(1)-Br(2) bond length is 3.31 Å. There are a spread of Nd(1)-Br(1) bond distances ranging from 3.02-3.52 Å. In the second Nd site, Nd(2) is bonded in a 7-coordinate geometry to two equivalent S(1), two equivalent Br(2), and three equivalent Br(3) atoms. There is one shorter (2.79 Å) and one longer (2.80 Å) Nd(2)-S(1) bond length. There is one shorter (2.98 Å) and one longer (2.99 Å) Nd(2)-Br(2) bond length. There are a spread of Nd(2)-Br(3) bond distances ranging from 2.97-3.20 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Nd(1) and two equivalent Nd(2) atoms to form a mixture of edge and corner-sharing SNd4 tetrahedra. In the second S site, S(2) is bonded to four equivalent Nd(1) atoms to form a mixture of edge and corner-sharing SNd4 tetrahedra. There are three inequivalent Br sites. In the first Br site, Br(1) is bonded in a 2-coordinate geometry to three equivalent Nd(1) atoms. In the second Br site, Br(2) is bonded in a distorted trigonal planar geometry to one Nd(1) and two equivalent Nd(2) atoms. In the third Br site, Br(3) is bonded in a distorted T-shaped geometry to three equivalent Nd(2) atoms.