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CuN2O2(Br)4 crystallizes in the tetragonal I4/mmm space group. The structure is zero-dimensional and consists of four ammonia molecules, two cuprum molecules, eight hydrobromic acid molecules, and two hydrogen peroxide molecules.
Cu(OBr)2N2(Br)2 crystallizes in the tetragonal P4_2/mnm space group. The structure is one-dimensional and consists of four hydrobromic acid molecules; two Cu(OBr)2 ribbons oriented in the (0, 0, 1) direction; and two N2 ribbons oriented in the (0, 0, 1) direction. In each Cu(OBr)2 ribbon, Cu2+ is bonded in a linear geometry to two equivalent O2- atoms. Both Cu–O bond lengths are 1.86 Å. O2- is bonded in a distorted trigonal planar geometry to one Cu2+ and two equivalent Br2+ atoms. Both O–Br bond lengths are 2.09 Å. Br2+ is bonded in a 2-coordinate geometry to two equivalent O2- atoms. In each N2 ribbon, N3- is bonded in a linear geometry to two equivalent N3- atoms. Both N–N bond lengths are 3.08 Å.
Rb3Tm2Cu4Br13 crystallizes in the cubic Pn-3 space group. The structure is three-dimensional. Rb1+ is bonded in a 8-coordinate geometry to eight equivalent Br1- atoms. There are four shorter (3.61 Å) and four longer (3.85 Å) Rb–Br bond lengths. Tm3+ is bonded to six equivalent Br1- atoms to form TmBr6 octahedra that share corners with six equivalent CuBr4 tetrahedra. All Tm–Br bond lengths are 2.78 Å. Cu1+ is bonded to four Br1- atoms to form CuBr4 tetrahedra that share corners with three equivalent TmBr6 octahedra and corners with three equivalent CuBr4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. There are one shorter (2.46 Å) and three longer (2.48 Å) Cu–Br bond lengths. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 2-coordinate geometry to two equivalent Rb1+, one Tm3+, and one Cu1+ atom. In the second Br1- site, Br1- is bonded in a tetrahedral geometry to four equivalent Cu1+ atoms.