CeN2 crystallizes in the monoclinic Cm space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 8-coordinate geometry to one N(1), one N(2), one N(4), one N(5), two equivalent N(3), and two equivalent N(6) atoms. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one N(1), one N(4), one N(6), two equivalent N(2), and two equivalent N(5) atoms. In the third Ce site, Ce(3) is bonded to one N(2), one N(3), one N(4), one N(5), and two equivalent N(1) atoms to form distorted corner-sharing CeN6 octahedra. The corner-sharing octahedral tilt angles are 38°. There are six inequivalent N sites. In the first N site, N(1) is bonded to one Ce(1), one Ce(2), and two equivalent Ce(3) atoms to form distorted corner-sharing NCe4 trigonal pyramids. In the second N site, N(2) is bonded in a 5-coordinate geometry to one Ce(1), one Ce(3), two equivalent Ce(2), and one N(5) atom. In the third N site, N(3) is bonded in a distorted square co-planar geometry to one Ce(3), two equivalent Ce(1), and one N(6) atom. In the fourth N site, N(4) is bonded in a distorted T-shaped geometry to one Ce(1), one Ce(2), and one Ce(3) atom. In the fifth N site, N(5) is bonded in a 5-coordinate geometry to one Ce(1), one Ce(3), two equivalent Ce(2), and one N(2) atom. In the sixth N site, N(6) is bonded in a distorted square co-planar geometry to one Ce(2), two equivalent Ce(1), and one N(3) atom.
CeN2 crystallizes in the monoclinic Cm space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 8-coordinate geometry to one N(1), one N(2), one N(4), one N(5), two equivalent N(3), and two equivalent N(6) atoms. The Ce(1)-N(1) bond length is 2.34 Å. The Ce(1)-N(2) bond length is 2.56 Å. The Ce(1)-N(4) bond length is 2.20 Å. The Ce(1)-N(5) bond length is 2.65 Å. Both Ce(1)-N(3) bond lengths are 2.45 Å. Both Ce(1)-N(6) bond lengths are 2.47 Å. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one N(1), one N(4), one N(6), two equivalent N(2), and two equivalent N(5) atoms. The Ce(2)-N(1) bond length is 2.24 Å. The Ce(2)-N(4) bond length is 2.22 Å. The Ce(2)-N(6) bond length is 2.48 Å. Both Ce(2)-N(2) bond lengths are 2.60 Å. Both Ce(2)-N(5) bond lengths are 2.47 Å. In the third Ce site, Ce(3) is bonded to one N(2), one N(3), one N(4), one N(5), and two equivalent N(1) atoms to form distorted corner-sharing CeN6 octahedra. The corner-sharing octahedral tilt angles are 38°. The Ce(3)-N(2) bond length is 2.31 Å. The Ce(3)-N(3) bond length is 2.45 Å. The Ce(3)-N(4) bond length is 2.33 Å. The Ce(3)-N(5) bond length is 2.30 Å. Both Ce(3)-N(1) bond lengths are 2.49 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded to one Ce(1), one Ce(2), and two equivalent Ce(3) atoms to form distorted corner-sharing NCe4 trigonal pyramids. In the second N site, N(2) is bonded in a 5-coordinate geometry to one Ce(1), one Ce(3), two equivalent Ce(2), and one N(5) atom. The N(2)-N(5) bond length is 1.30 Å. In the third N site, N(3) is bonded in a distorted square co-planar geometry to one Ce(3), two equivalent Ce(1), and one N(6) atom. The N(3)-N(6) bond length is 1.22 Å. In the fourth N site, N(4) is bonded in a distorted T-shaped geometry to one Ce(1), one Ce(2), and one Ce(3) atom. In the fifth N site, N(5) is bonded in a 5-coordinate geometry to one Ce(1), one Ce(3), two equivalent Ce(2), and one N(2) atom. In the sixth N site, N(6) is bonded in a distorted square co-planar geometry to one Ce(2), two equivalent Ce(1), and one N(3) atom.