The crystal structure of diamminesilver dinitroargentate, [Ag(NH3)2]Ag(NO2)2*

Abstract

Abstract The crystal structure of diamminesilver dinitroargentate, [Ag(NH3)2]-Ag(NO2)2, has been determined by X-ray diffraction methods. Diamminesilver dinitroargentate crystallizes tetragonal with the space group S 4 1 – P[unk]. The lattice constants are a = 9.633 ± 0.005 Å and c = 8.330 ± 0.005 Å. There are 4 formula units within the unit cell. The point positions of the silver atoms were obtained by the heavy-atom method whereas those of the light atoms were found by difference Fourier syntheses. Coordinates and anisotropic temperature factors were refined by block-diagonal least-squares methods with the result R = 0.040 for 1618 independent reflections. The structure is built up from a framework of silver and nitrite ions intercalating pairs of linear diamminesilver ions. There is disorder in the orientation of the nitrite ions with respect to one of the two neighboring silver ions.