K2Mo(CO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one O(1), one O(3), one O(5), one O(7), one O(8), two equivalent O(2), and two equivalent O(4) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(4), one O(7), one O(8), two equivalent O(5), and two equivalent O(6) atoms. Mo(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(7), and two equivalent O(1) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(6) atom. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(5) atom. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one Mo(1) atom. In the second O site, O(5) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one C(2) atom. In the third O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(2) and one C(1) atom. In the fourth O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one Mo(1) atom. In the fifth O site, O(8) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one O(8) atom. In the sixth O site, O(1) is bonded in a 3-coordinate geometry to one K(1) and two equivalent Mo(1) atoms. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), one Mo(1), and one C(2) atom. In the eighth O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one Mo(1), and one C(1) atom.
K2Mo(CO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one O(1), one O(3), one O(5), one O(7), one O(8), two equivalent O(2), and two equivalent O(4) atoms. The K(1)-O(1) bond length is 2.87 Å. The K(1)-O(3) bond length is 2.82 Å. The K(1)-O(5) bond length is 3.01 Å. The K(1)-O(7) bond length is 2.81 Å. The K(1)-O(8) bond length is 3.37 Å. There is one shorter (2.88 Å) and one longer (3.03 Å) K(1)-O(2) bond length. There is one shorter (2.81 Å) and one longer (2.99 Å) K(1)-O(4) bond length. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(4), one O(7), one O(8), two equivalent O(5), and two equivalent O(6) atoms. The K(2)-O(4) bond length is 3.03 Å. The K(2)-O(7) bond length is 2.70 Å. The K(2)-O(8) bond length is 3.21 Å. There is one shorter (2.75 Å) and one longer (2.94 Å) K(2)-O(5) bond length. There is one shorter (2.88 Å) and one longer (2.91 Å) K(2)-O(6) bond length. Mo(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(7), and two equivalent O(1) atoms. The Mo(1)-O(2) bond length is 2.25 Å. The Mo(1)-O(3) bond length is 2.23 Å. The Mo(1)-O(4) bond length is 1.77 Å. The Mo(1)-O(7) bond length is 1.77 Å. There is one shorter (1.85 Å) and one longer (2.09 Å) Mo(1)-O(1) bond length. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(6) atom. The C(1)-O(3) bond length is 1.29 Å. The C(1)-O(6) bond length is 1.24 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(5) atom. The C(2)-O(2) bond length is 1.29 Å. The C(2)-O(5) bond length is 1.25 Å. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one Mo(1) atom. In the second O site, O(5) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one C(2) atom. In the third O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(2) and one C(1) atom. In the fourth O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one Mo(1) atom. In the fifth O site, O(8) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one O(8) atom. The O(8)-O(8) bond length is 1.24 Å. In the sixth O site, O(1) is bonded in a 3-coordinate geometry to one K(1) and two equivalent Mo(1) atoms. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), one Mo(1), and one C(2) atom. In the eighth O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one Mo(1), and one C(1) atom.