NaCoH3(CO2)3 crystallizes in the monoclinic C2 space group. Na(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(6) atoms to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra and edges with two equivalent Co(1)O6 octahedra. Co(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form CoO6 octahedra that share  an edgeedge with one Co(1)O6 octahedra and edges with two equivalent Na(1)O6 octahedra. There are four inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one H(1) and two equivalent O(1) atoms. In the second C site, C(2) is bonded in a trigonal planar geometry to one H(2), one O(2), and one O(5) atom. In the third C site, C(3) is bonded in a trigonal planar geometry to one H(3), one O(3), and one O(6) atom. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one H(4) and two equivalent O(4) atoms. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(1), one Co(1), and one C(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Co(1), and one C(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one C(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Co(1), and one C(4) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Co(1), and one C(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one C(3) atom.
NaCoH3(CO2)3 crystallizes in the monoclinic C2 space group. Na(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(6) atoms to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra and edges with two equivalent Co(1)O6 octahedra. The Na(1)-O(1) bond length is 2.29 Å. The Na(1)-O(2) bond length is 2.37 Å. The Na(1)-O(4) bond length is 2.40 Å. The Na(1)-O(5) bond length is 2.39 Å. There is one shorter (2.30 Å) and one longer (2.31 Å) Na(1)-O(6) bond length. Co(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form CoO6 octahedra that share  an edgeedge with one Co(1)O6 octahedra and edges with two equivalent Na(1)O6 octahedra. The Co(1)-O(1) bond length is 2.09 Å. The Co(1)-O(2) bond length is 2.17 Å. The Co(1)-O(4) bond length is 2.13 Å. The Co(1)-O(5) bond length is 2.08 Å. There is one shorter (2.14 Å) and one longer (2.23 Å) Co(1)-O(3) bond length. There are four inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one H(1) and two equivalent O(1) atoms. The C(1)-H(1) bond length is 1.11 Å. Both C(1)-O(1) bond lengths are 1.26 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one H(2), one O(2), and one O(5) atom. The C(2)-H(2) bond length is 1.11 Å. The C(2)-O(2) bond length is 1.27 Å. The C(2)-O(5) bond length is 1.27 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one H(3), one O(3), and one O(6) atom. The C(3)-H(3) bond length is 1.11 Å. The C(3)-O(3) bond length is 1.29 Å. The C(3)-O(6) bond length is 1.24 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one H(4) and two equivalent O(4) atoms. The C(4)-H(4) bond length is 1.11 Å. Both C(4)-O(4) bond lengths are 1.27 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(1), one Co(1), and one C(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Co(1), and one C(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one C(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Co(1), and one C(4) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Co(1), and one C(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one C(3) atom.