SmH3(CO2)3 crystallizes in the trigonal R3m space group. Sm(1) is bonded in a 9-coordinate geometry to three equivalent O(2) and six equivalent O(1) atoms. 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 distorted single-bond geometry to two equivalent Sm(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Sm(1) and one C(1) atom.
SmH3(CO2)3 crystallizes in the trigonal R3m space group. Sm(1) is bonded in a 9-coordinate geometry to three equivalent O(2) and six equivalent O(1) atoms. All Sm(1)-O(2) bond lengths are 2.44 Å. There are three shorter (2.54 Å) and three longer (2.59 Å) Sm(1)-O(1) 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 1.28 Å. The C(1)-O(2) bond length is 1.27 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 distorted single-bond geometry to two equivalent Sm(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Sm(1) and one C(1) atom.