(CeAs(O2F)2)2N2 crystallizes in the monoclinic P2_1/m space group. The structure consists of two ammonia atoms inside a CeAs(O2F)2 framework. In the CeAs(O2F)2 framework, Ce(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), two equivalent O(2), and four equivalent F(1) atoms. As(1) is bonded in a tetrahedral geometry to one O(1), one O(3), and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ce(1) and one As(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ce(1) and one As(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ce(1) and one As(1) atom. F(1) is bonded in a bent 120 degrees geometry to two equivalent Ce(1) atoms.
(CeAs(O2F)2)2N2 crystallizes in the monoclinic P2_1/m space group. The structure consists of two ammonia atoms inside a CeAs(O2F)2 framework. In the CeAs(O2F)2 framework, Ce(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), two equivalent O(2), and four equivalent F(1) atoms. The Ce(1)-O(1) bond length is 2.55 Å. The Ce(1)-O(3) bond length is 2.34 Å. Both Ce(1)-O(2) bond lengths are 2.24 Å. There are two shorter (2.31 Å) and two longer (2.32 Å) Ce(1)-F(1) bond lengths. As(1) is bonded in a tetrahedral geometry to one O(1), one O(3), and two equivalent O(2) atoms. The As(1)-O(1) bond length is 1.72 Å. The As(1)-O(3) bond length is 1.71 Å. Both As(1)-O(2) bond lengths are 1.72 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ce(1) and one As(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ce(1) and one As(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ce(1) and one As(1) atom. F(1) is bonded in a bent 120 degrees geometry to two equivalent Ce(1) atoms.