K2BaNi(NO2)6 crystallizes in the monoclinic Cm space group. K(1) is bonded in a 8-coordinate geometry to one O(4), one O(5), one O(6), one O(7), two equivalent O(1), and two equivalent O(2) atoms. Ba(1) is bonded in a 12-coordinate geometry to one N(4), one N(5), two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Ni(1) is bonded in a tetrahedral geometry to one N(1), one N(2), and two equivalent N(3) atoms. There are five inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Ni(1) and two equivalent O(2) atoms. In the second N site, N(2) is bonded in a trigonal planar geometry to one Ni(1) and two equivalent O(1) atoms. In the third N site, N(3) is bonded in a bent 150 degrees geometry to one Ni(1) and one O(3) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Ba(1), one O(6), and two equivalent O(4) atoms. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one Ba(1), one O(7), and two equivalent O(5) atoms. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1), one Ba(1), and one N(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), one Ba(1), and one N(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ba(1) and one N(3) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one Ba(1), and one N(4) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one K(1), one Ba(1), and one N(5) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to two equivalent K(1) and one N(4) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent K(1) and one N(5) atom.
K2BaNi(NO2)6 crystallizes in the monoclinic Cm space group. K(1) is bonded in a 8-coordinate geometry to one O(4), one O(5), one O(6), one O(7), two equivalent O(1), and two equivalent O(2) atoms. The K(1)-O(4) bond length is 2.99 Å. The K(1)-O(5) bond length is 2.94 Å. The K(1)-O(6) bond length is 3.12 Å. The K(1)-O(7) bond length is 3.09 Å. There is one shorter (3.32 Å) and one longer (3.39 Å) K(1)-O(1) bond length. There is one shorter (3.31 Å) and one longer (3.35 Å) K(1)-O(2) bond length. Ba(1) is bonded in a 12-coordinate geometry to one N(4), one N(5), two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. The Ba(1)-N(4) bond length is 3.05 Å. The Ba(1)-N(5) bond length is 3.13 Å. Both Ba(1)-O(1) bond lengths are 2.79 Å. Both Ba(1)-O(2) bond lengths are 2.84 Å. Both Ba(1)-O(3) bond lengths are 2.79 Å. Both Ba(1)-O(4) bond lengths are 3.02 Å. Both Ba(1)-O(5) bond lengths are 3.16 Å. Ni(1) is bonded in a tetrahedral geometry to one N(1), one N(2), and two equivalent N(3) atoms. The Ni(1)-N(1) bond length is 1.92 Å. The Ni(1)-N(2) bond length is 2.00 Å. Both Ni(1)-N(3) bond lengths are 1.78 Å. There are five inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Ni(1) and two equivalent O(2) atoms. Both N(1)-O(2) bond lengths are 1.27 Å. In the second N site, N(2) is bonded in a trigonal planar geometry to one Ni(1) and two equivalent O(1) atoms. Both N(2)-O(1) bond lengths are 1.28 Å. In the third N site, N(3) is bonded in a bent 150 degrees geometry to one Ni(1) and one O(3) atom. The N(3)-O(3) bond length is 1.21 Å. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Ba(1), one O(6), and two equivalent O(4) atoms. The N(4)-O(6) bond length is 1.26 Å. Both N(4)-O(4) bond lengths are 1.28 Å. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one Ba(1), one O(7), and two equivalent O(5) atoms. The N(5)-O(7) bond length is 1.27 Å. Both N(5)-O(5) bond lengths are 1.27 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1), one Ba(1), and one N(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), one Ba(1), and one N(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ba(1) and one N(3) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one Ba(1), and one N(4) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one K(1), one Ba(1), and one N(5) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to two equivalent K(1) and one N(4) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent K(1) and one N(5) atom.