The Silver(I) Mercury (II) Oxide Nitrate with the Empirical Formula AgHg_2NO_5

摘要

The title compound was prepared by solid state reaction of Ag_2O with Hg(NO_3)_2 centre dot H_2O in air at 350 deg C. Its crystal structure was determined from single-crystal diffractometer data: Pnma, a = 620.1 (1) pm, b = 670.1 (1) pm, c = 1267.5 (2) pm, Z = 4, R = 0.026 for 586 structure factors and 33 variable parameters. The compound may be represented by the formula Ag (HgO)_2NO_3. The mercury (II) together with the oxygen atoms form zig-zag chains with linear coordination of the mercury atoms. The oxygen atoms of these chains are linked via silver (I) atoms, thus forming two-dimensionally infinite nets, which contain the trigonal planar nitrate groups in interstices. Thus, only secondary Hg-O and Ag-O bonds are formed between the nets.