Co(NO3)2 crystallizes in the triclinic P-1 space group. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in an octahedral geometry to two equivalent O(10), two equivalent O(11), and two equivalent O(12) atoms. In the second Co site, Co(2) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(6), and two equivalent O(9) atoms. In the third Co site, Co(3) is bonded in an octahedral geometry to two equivalent O(3), two equivalent O(5), and two equivalent O(8) atoms. In the fourth Co site, Co(4) is bonded in an octahedral geometry to two equivalent O(2), two equivalent O(4), and two equivalent O(7) atoms. There are four inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one O(1), one O(10), and one O(7) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one O(12), one O(3), and one O(9) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one O(11), one O(2), and one O(8) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Co(2) and one N(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Co(4) and one N(4) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Co(3) and one N(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Co(4) and one N(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Co(3) and one N(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(2) and one N(1) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Co(4) and one N(2) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Co(3) and one N(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Co(2) and one N(3) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Co(1) and one N(2) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one N(4) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Co(1) and one N(3) atom.
Co(NO3)2 crystallizes in the triclinic P-1 space group. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in an octahedral geometry to two equivalent O(10), two equivalent O(11), and two equivalent O(12) atoms. Both Co(1)-O(10) bond lengths are 2.11 Å. Both Co(1)-O(11) bond lengths are 2.09 Å. Both Co(1)-O(12) bond lengths are 2.10 Å. In the second Co site, Co(2) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(6), and two equivalent O(9) atoms. Both Co(2)-O(1) bond lengths are 2.11 Å. Both Co(2)-O(6) bond lengths are 2.06 Å. Both Co(2)-O(9) bond lengths are 2.05 Å. In the third Co site, Co(3) is bonded in an octahedral geometry to two equivalent O(3), two equivalent O(5), and two equivalent O(8) atoms. Both Co(3)-O(3) bond lengths are 2.11 Å. Both Co(3)-O(5) bond lengths are 2.06 Å. Both Co(3)-O(8) bond lengths are 2.05 Å. In the fourth Co site, Co(4) is bonded in an octahedral geometry to two equivalent O(2), two equivalent O(4), and two equivalent O(7) atoms. Both Co(4)-O(2) bond lengths are 2.11 Å. Both Co(4)-O(4) bond lengths are 2.06 Å. Both Co(4)-O(7) bond lengths are 2.05 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. The N(1)-O(4) bond length is 1.26 Å. The N(1)-O(5) bond length is 1.25 Å. The N(1)-O(6) bond length is 1.25 Å. In the second N site, N(2) is bonded in a trigonal planar geometry to one O(1), one O(10), and one O(7) atom. The N(2)-O(1) bond length is 1.26 Å. The N(2)-O(10) bond length is 1.26 Å. The N(2)-O(7) bond length is 1.26 Å. In the third N site, N(3) is bonded in a trigonal planar geometry to one O(12), one O(3), and one O(9) atom. The N(3)-O(12) bond length is 1.26 Å. The N(3)-O(3) bond length is 1.26 Å. The N(3)-O(9) bond length is 1.26 Å. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one O(11), one O(2), and one O(8) atom. The N(4)-O(11) bond length is 1.26 Å. The N(4)-O(2) bond length is 1.26 Å. The N(4)-O(8) bond length is 1.26 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Co(2) and one N(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Co(4) and one N(4) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Co(3) and one N(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Co(4) and one N(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Co(3) and one N(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(2) and one N(1) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Co(4) and one N(2) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Co(3) and one N(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Co(2) and one N(3) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Co(1) and one N(2) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one N(4) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Co(1) and one N(3) atom.