Mn(HCOO)2 crystallizes in the orthorhombic Pbcn space group. Mn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form edge-sharing MnO6 octahedra. C(1) is bonded in a trigonal planar geometry to one H(1), one O(1), and one O(2) atom. H(1) is bonded in a single-bond geometry to one C(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one C(1) atom.
Mn(HCOO)2 crystallizes in the orthorhombic Pbcn space group. Mn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form edge-sharing MnO6 octahedra. Both Mn(1)-O(1) bond lengths are 2.18 Å. There are two shorter (2.24 Å) and two longer (2.28 Å) Mn(1)-O(2) bond lengths. C(1) is bonded in a trigonal planar geometry to one H(1), one O(1), and one O(2) atom. The C(1)-H(1) bond length is 1.10 Å. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.28 Å. H(1) is bonded in a single-bond geometry to one C(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one C(1) atom.