RbMo3Br7 crystallizes in the monoclinic Cc space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to one Br(7), one Br(8), two equivalent Br(11), and two equivalent Br(4) atoms to form distorted RbBr6 pentagonal pyramids that share  a cornercorner with one Mo(2)Br5 square pyramid,  a cornercorner with one Mo(5)Br5 square pyramid, corners with two equivalent Mo(3)Br5 square pyramids, corners with two equivalent Mo(4)Br5 square pyramids, and edges with two equivalent Rb(1)Br6 pentagonal pyramids. In the second Rb site, Rb(2) is bonded to one Br(3), one Br(6), two equivalent Br(1), and two equivalent Br(14) atoms to form distorted RbBr6 pentagonal pyramids that share  a cornercorner with one Mo(1)Br5 square pyramid,  a cornercorner with one Mo(3)Br5 square pyramid,  a cornercorner with one Mo(4)Br5 square pyramid,  a cornercorner with one Mo(6)Br5 square pyramid, corners with two equivalent Mo(5)Br5 square pyramids, edges with two equivalent Rb(2)Br6 pentagonal pyramids,  an edgeedge with one Mo(1)Br5 square pyramid, and  an edgeedge with one Mo(6)Br5 square pyramid. There are six inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one Br(1), one Br(12), one Br(2), one Br(5), and one Br(6) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(2)Br6 pentagonal pyramid,  an edgeedge with one Rb(2)Br6 pentagonal pyramid,  an edgeedge with one Mo(2)Br5 square pyramid,  an edgeedge with one Mo(3)Br5 square pyramid,  an edgeedge with one Mo(4)Br5 square pyramid, and  an edgeedge with one Mo(5)Br5 square pyramid. In the second Mo site, Mo(2) is bonded to one Br(10), one Br(12), one Br(2), one Br(7), and one Br(9) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(1)Br6 pentagonal pyramid,  an edgeedge with one Mo(1)Br5 square pyramid,  an edgeedge with one Mo(3)Br5 square pyramid,  an edgeedge with one Mo(4)Br5 square pyramid, and  an edgeedge with one Mo(6)Br5 square pyramid. In the third Mo site, Mo(3) is bonded to one Br(2), one Br(3), one Br(4), one Br(5), and one Br(9) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(2)Br6 pentagonal pyramid, corners with two equivalent Rb(1)Br6 pentagonal pyramids,  an edgeedge with one Mo(1)Br5 square pyramid,  an edgeedge with one Mo(2)Br5 square pyramid,  an edgeedge with one Mo(5)Br5 square pyramid, and  an edgeedge with one Mo(6)Br5 square pyramid. In the fourth Mo site, Mo(4) is bonded to one Br(10), one Br(11), one Br(12), one Br(13), and one Br(6) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(2)Br6 pentagonal pyramid, corners with two equivalent Rb(1)Br6 pentagonal pyramids,  an edgeedge with one Mo(1)Br5 square pyramid,  an edgeedge with one Mo(2)Br5 square pyramid,  an edgeedge with one Mo(5)Br5 square pyramid, and  an edgeedge with one Mo(6)Br5 square pyramid. In the fifth Mo site, Mo(5) is bonded to one Br(13), one Br(3), one Br(5), one Br(6), and one Br(8) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(1)Br6 pentagonal pyramid, corners with two equivalent Rb(2)Br6 pentagonal pyramids,  an edgeedge with one Mo(1)Br5 square pyramid,  an edgeedge with one Mo(3)Br5 square pyramid,  an edgeedge with one Mo(4)Br5 square pyramid, and  an edgeedge with one Mo(6)Br5 square pyramid. In the sixth Mo site, Mo(6) is bonded to one Br(10), one Br(13), one Br(14), one Br(3), and one Br(9) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(2)Br6 pentagonal pyramid,  an edgeedge with one Rb(2)Br6 pentagonal pyramid,  an edgeedge with one Mo(2)Br5 square pyramid,  an edgeedge with one Mo(3)Br5 square pyramid,  an edgeedge with one Mo(4)Br5 square pyramid, and  an edgeedge with one Mo(5)Br5 square pyramid. There are fourteen inequivalent Br sites. In the first Br site, Br(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Rb(2) and one Mo(1) atom. In the second Br site, Br(2) is bonded in a 3-coordinate geometry to one Mo(1), one Mo(2), and one Mo(3) atom. In the third Br site, Br(3) is bonded in a 4-coordinate geometry to one Rb(2), one Mo(3), one Mo(5), and one Mo(6) atom. In the fourth Br site, Br(4) is bonded in a distorted trigonal planar geometry to two equivalent Rb(1) and one Mo(3) atom. In the fifth Br site, Br(5) is bonded in a 3-coordinate geometry to one Mo(1), one Mo(3), and one Mo(5) atom. In the sixth Br site, Br(6) is bonded in a 4-coordinate geometry to one Rb(2), one Mo(1), one Mo(4), and one Mo(5) atom. In the seventh Br site, Br(7) is bonded in a bent 120 degrees geometry to one Rb(1) and one Mo(2) atom. In the eighth Br site, Br(8) is bonded in a bent 120 degrees geometry to one Rb(1) and one Mo(5) atom. In the ninth Br site, Br(9) is bonded in a 3-coordinate geometry to one Mo(2), one Mo(3), and one Mo(6) atom. In the tenth Br site, Br(10) is bonded in a 3-coordinate geometry to one Mo(2), one Mo(4), and one Mo(6) atom. In the eleventh Br site, Br(11) is bonded in a distorted trigonal planar geometry to two equivalent Rb(1) and one Mo(4) atom. In the twelfth Br site, Br(12) is bonded in a 3-coordinate geometry to one Mo(1), one Mo(2), and one Mo(4) atom. In the thirteenth Br site, Br(13) is bonded in a 3-coordinate geometry to one Mo(4), one Mo(5), and one Mo(6) atom. In the fourteenth Br site, Br(14) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Rb(2) and one Mo(6) atom.
RbMo3Br7 crystallizes in the monoclinic Cc space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to one Br(7), one Br(8), two equivalent Br(11), and two equivalent Br(4) atoms to form distorted RbBr6 pentagonal pyramids that share  a cornercorner with one Mo(2)Br5 square pyramid,  a cornercorner with one Mo(5)Br5 square pyramid, corners with two equivalent Mo(3)Br5 square pyramids, corners with two equivalent Mo(4)Br5 square pyramids, and edges with two equivalent Rb(1)Br6 pentagonal pyramids. The Rb(1)-Br(7) bond length is 3.50 Å. The Rb(1)-Br(8) bond length is 3.51 Å. There is one shorter (3.45 Å) and one longer (3.54 Å) Rb(1)-Br(11) bond length. There is one shorter (3.46 Å) and one longer (3.53 Å) Rb(1)-Br(4) bond length. In the second Rb site, Rb(2) is bonded to one Br(3), one Br(6), two equivalent Br(1), and two equivalent Br(14) atoms to form distorted RbBr6 pentagonal pyramids that share  a cornercorner with one Mo(1)Br5 square pyramid,  a cornercorner with one Mo(3)Br5 square pyramid,  a cornercorner with one Mo(4)Br5 square pyramid,  a cornercorner with one Mo(6)Br5 square pyramid, corners with two equivalent Mo(5)Br5 square pyramids, edges with two equivalent Rb(2)Br6 pentagonal pyramids,  an edgeedge with one Mo(1)Br5 square pyramid, and  an edgeedge with one Mo(6)Br5 square pyramid. The Rb(2)-Br(3) bond length is 3.75 Å. The Rb(2)-Br(6) bond length is 3.73 Å. There is one shorter (3.34 Å) and one longer (3.41 Å) Rb(2)-Br(1) bond length. There is one shorter (3.34 Å) and one longer (3.45 Å) Rb(2)-Br(14) bond length. There are six inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one Br(1), one Br(12), one Br(2), one Br(5), and one Br(6) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(2)Br6 pentagonal pyramid,  an edgeedge with one Rb(2)Br6 pentagonal pyramid,  an edgeedge with one Mo(2)Br5 square pyramid,  an edgeedge with one Mo(3)Br5 square pyramid,  an edgeedge with one Mo(4)Br5 square pyramid, and  an edgeedge with one Mo(5)Br5 square pyramid. The Mo(1)-Br(1) bond length is 2.65 Å. The Mo(1)-Br(12) bond length is 2.62 Å. The Mo(1)-Br(2) bond length is 2.63 Å. The Mo(1)-Br(5) bond length is 2.62 Å. The Mo(1)-Br(6) bond length is 2.63 Å. In the second Mo site, Mo(2) is bonded to one Br(10), one Br(12), one Br(2), one Br(7), and one Br(9) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(1)Br6 pentagonal pyramid,  an edgeedge with one Mo(1)Br5 square pyramid,  an edgeedge with one Mo(3)Br5 square pyramid,  an edgeedge with one Mo(4)Br5 square pyramid, and  an edgeedge with one Mo(6)Br5 square pyramid. The Mo(2)-Br(10) bond length is 2.61 Å. The Mo(2)-Br(12) bond length is 2.62 Å. The Mo(2)-Br(2) bond length is 2.62 Å. The Mo(2)-Br(7) bond length is 2.60 Å. The Mo(2)-Br(9) bond length is 2.62 Å. In the third Mo site, Mo(3) is bonded to one Br(2), one Br(3), one Br(4), one Br(5), and one Br(9) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(2)Br6 pentagonal pyramid, corners with two equivalent Rb(1)Br6 pentagonal pyramids,  an edgeedge with one Mo(1)Br5 square pyramid,  an edgeedge with one Mo(2)Br5 square pyramid,  an edgeedge with one Mo(5)Br5 square pyramid, and  an edgeedge with one Mo(6)Br5 square pyramid. The Mo(3)-Br(2) bond length is 2.62 Å. The Mo(3)-Br(3) bond length is 2.63 Å. The Mo(3)-Br(4) bond length is 2.64 Å. The Mo(3)-Br(5) bond length is 2.61 Å. The Mo(3)-Br(9) bond length is 2.63 Å. In the fourth Mo site, Mo(4) is bonded to one Br(10), one Br(11), one Br(12), one Br(13), and one Br(6) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(2)Br6 pentagonal pyramid, corners with two equivalent Rb(1)Br6 pentagonal pyramids,  an edgeedge with one Mo(1)Br5 square pyramid,  an edgeedge with one Mo(2)Br5 square pyramid,  an edgeedge with one Mo(5)Br5 square pyramid, and  an edgeedge with one Mo(6)Br5 square pyramid. The Mo(4)-Br(10) bond length is 2.61 Å. The Mo(4)-Br(11) bond length is 2.63 Å. The Mo(4)-Br(12) bond length is 2.62 Å. The Mo(4)-Br(13) bond length is 2.62 Å. The Mo(4)-Br(6) bond length is 2.64 Å. In the fifth Mo site, Mo(5) is bonded to one Br(13), one Br(3), one Br(5), one Br(6), and one Br(8) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(1)Br6 pentagonal pyramid, corners with two equivalent Rb(2)Br6 pentagonal pyramids,  an edgeedge with one Mo(1)Br5 square pyramid,  an edgeedge with one Mo(3)Br5 square pyramid,  an edgeedge with one Mo(4)Br5 square pyramid, and  an edgeedge with one Mo(6)Br5 square pyramid. The Mo(5)-Br(13) bond length is 2.62 Å. The Mo(5)-Br(3) bond length is 2.63 Å. The Mo(5)-Br(5) bond length is 2.62 Å. The Mo(5)-Br(6) bond length is 2.62 Å. The Mo(5)-Br(8) bond length is 2.60 Å. In the sixth Mo site, Mo(6) is bonded to one Br(10), one Br(13), one Br(14), one Br(3), and one Br(9) atom to form distorted MoBr5 square pyramids that share  a cornercorner with one Rb(2)Br6 pentagonal pyramid,  an edgeedge with one Rb(2)Br6 pentagonal pyramid,  an edgeedge with one Mo(2)Br5 square pyramid,  an edgeedge with one Mo(3)Br5 square pyramid,  an edgeedge with one Mo(4)Br5 square pyramid, and  an edgeedge with one Mo(5)Br5 square pyramid. The Mo(6)-Br(10) bond length is 2.62 Å. The Mo(6)-Br(13) bond length is 2.63 Å. The Mo(6)-Br(14) bond length is 2.65 Å. The Mo(6)-Br(3) bond length is 2.64 Å. The Mo(6)-Br(9) bond length is 2.62 Å. There are fourteen inequivalent Br sites. In the first Br site, Br(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Rb(2) and one Mo(1) atom. In the second Br site, Br(2) is bonded in a 3-coordinate geometry to one Mo(1), one Mo(2), and one Mo(3) atom. In the third Br site, Br(3) is bonded in a 4-coordinate geometry to one Rb(2), one Mo(3), one Mo(5), and one Mo(6) atom. In the fourth Br site, Br(4) is bonded in a distorted trigonal planar geometry to two equivalent Rb(1) and one Mo(3) atom. In the fifth Br site, Br(5) is bonded in a 3-coordinate geometry to one Mo(1), one Mo(3), and one Mo(5) atom. In the sixth Br site, Br(6) is bonded in a 4-coordinate geometry to one Rb(2), one Mo(1), one Mo(4), and one Mo(5) atom. In the seventh Br site, Br(7) is bonded in a bent 120 degrees geometry to one Rb(1) and one Mo(2) atom. In the eighth Br site, Br(8) is bonded in a bent 120 degrees geometry to one Rb(1) and one Mo(5) atom. In the ninth Br site, Br(9) is bonded in a 3-coordinate geometry to one Mo(2), one Mo(3), and one Mo(6) atom. In the tenth Br site, Br(10) is bonded in a 3-coordinate geometry to one Mo(2), one Mo(4), and one Mo(6) atom. In the eleventh Br site, Br(11) is bonded in a distorted trigonal planar geometry to two equivalent Rb(1) and one Mo(4) atom. In the twelfth Br site, Br(12) is bonded in a 3-coordinate geometry to one Mo(1), one Mo(2), and one Mo(4) atom. In the thirteenth Br site, Br(13) is bonded in a 3-coordinate geometry to one Mo(4), one Mo(5), and one Mo(6) atom. In the fourteenth Br site, Br(14) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Rb(2) and one Mo(6) atom.