MgTm2Mo2(O4Cl)2 crystallizes in the monoclinic C2 space group. Mg(1) is bonded in an octahedral geometry to two equivalent O(2), two equivalent O(3), and two equivalent Cl(1) atoms. Tm(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), two equivalent O(2), two equivalent O(4), and one Cl(1) atom. Mo(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Tm(1) and one Mo(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), two equivalent Tm(1), and one Mo(1) atom. In the third O site, O(3) is bonded in a T-shaped geometry to one Mg(1), one Tm(1), and one Mo(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Tm(1) and one Mo(1) atom. Cl(1) is bonded in a distorted single-bond geometry to one Mg(1) and one Tm(1) atom.
MgTm2Mo2(O4Cl)2 crystallizes in the monoclinic C2 space group. Mg(1) is bonded in an octahedral geometry to two equivalent O(2), two equivalent O(3), and two equivalent Cl(1) atoms. Both Mg(1)-O(2) bond lengths are 2.06 Å. Both Mg(1)-O(3) bond lengths are 2.16 Å. Both Mg(1)-Cl(1) bond lengths are 2.43 Å. Tm(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), two equivalent O(2), two equivalent O(4), and one Cl(1) atom. The Tm(1)-O(1) bond length is 2.23 Å. The Tm(1)-O(3) bond length is 2.19 Å. There is one shorter (2.26 Å) and one longer (2.50 Å) Tm(1)-O(2) bond length. There is one shorter (2.25 Å) and one longer (2.37 Å) Tm(1)-O(4) bond length. The Tm(1)-Cl(1) bond length is 2.89 Å. Mo(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Mo(1)-O(1) bond length is 1.80 Å. The Mo(1)-O(2) bond length is 1.96 Å. The Mo(1)-O(3) bond length is 1.90 Å. The Mo(1)-O(4) bond length is 1.86 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Tm(1) and one Mo(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), two equivalent Tm(1), and one Mo(1) atom. In the third O site, O(3) is bonded in a T-shaped geometry to one Mg(1), one Tm(1), and one Mo(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Tm(1) and one Mo(1) atom. Cl(1) is bonded in a distorted single-bond geometry to one Mg(1) and one Tm(1) atom.