One- and three-dimensional infinite arrays of Cu(I) ions exhibited by [Cu(NH3)2]Br and [Cu(NH3)Cl] in the solid state.

In the solid state, [Cu(NH3)Cl] forms a three-dimensional network with each Cu(I) ion being surrounded by three other Cu(I) centres in a trigonal-planar fashion [Cu...Cu = 2.979(1) A; cubic space group I2(1)3], whereas in [Cu(NH3)2]Br the cations establish infinite linear (Cu...Cu) chains spanning the crystal lattice [Cu...Cu = 2.931(1) A; monoclinic space group C2/c].