Pr(MoO2)6 crystallizes in the tetragonal I4/m space group. Pr(1) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form a mixture of edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 49-57°. In the second Mo site, Mo(2) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form a mixture of edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. There are four inequivalent O sites. In the first O site, O(2) is bonded in a rectangular see-saw-like geometry to one Pr(1), one Mo(2), and two equivalent Mo(1) atoms. In the second O site, O(3) is bonded in a trigonal planar geometry to one Mo(2) and two equivalent Mo(1) atoms. In the third O site, O(4) is bonded in a distorted T-shaped geometry to one Mo(2) and two equivalent Mo(1) atoms. In the fourth O site, O(1) is bonded in a trigonal planar geometry to one Mo(2) and two equivalent Mo(1) atoms.
Pr(MoO2)6 crystallizes in the tetragonal I4/m space group. Pr(1) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. All Pr(1)-O(2) bond lengths are 2.45 Å. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form a mixture of edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 49-57°. The Mo(1)-O(3) bond length is 2.09 Å. The Mo(1)-O(4) bond length is 2.15 Å. There is one shorter (2.06 Å) and one longer (2.10 Å) Mo(1)-O(1) bond length. There is one shorter (2.22 Å) and one longer (2.23 Å) Mo(1)-O(2) bond length. In the second Mo site, Mo(2) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form a mixture of edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. The Mo(2)-O(3) bond length is 1.95 Å. The Mo(2)-O(4) bond length is 2.08 Å. Both Mo(2)-O(1) bond lengths are 2.04 Å. Both Mo(2)-O(2) bond lengths are 2.23 Å. There are four inequivalent O sites. In the first O site, O(2) is bonded in a rectangular see-saw-like geometry to one Pr(1), one Mo(2), and two equivalent Mo(1) atoms. In the second O site, O(3) is bonded in a trigonal planar geometry to one Mo(2) and two equivalent Mo(1) atoms. In the third O site, O(4) is bonded in a distorted T-shaped geometry to one Mo(2) and two equivalent Mo(1) atoms. In the fourth O site, O(1) is bonded in a trigonal planar geometry to one Mo(2) and two equivalent Mo(1) atoms.