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Cremer, Ulrich
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article
Mercurous Azide, Hg2(N3)2
Abstract
<p>White polycrystalline mercurous azide, Hg<sub>2</sub>(N<sub>3</sub>) <sub>2</sub>, is obtained by combining aqueous solutions of NaN<sub>3</sub> and Hg<sub>2</sub>(NO<sub>3</sub>)<sub>2</sub>·2H<sub>2</sub>O (made viscuous by addition of tetramethoxysilane and heating at 65°C). The crystal structure was solved and refined from X-ray powder diffraction data (monoclinic, P2<sub>1</sub>/n, a = 596.07(2) pm, b = 1259.07(4) pm, c = 357.95(1) pm, β= 103.253(2)°, Z = 2, R<sub>B</sub> = 0.0519). Solid Hg<sub>2</sub>(N<sub>3</sub>)<sub>2</sub> contains, essentially, molecules of that composition with Hg-Hg distances of 254.4(3) pm, Hg-N distances of 218(2) pm and Hg-Hg-N angles of 178.7(6)°. Weak intermolecular interactions with Hg-N distances starting at 280(3) pm lead to a three-dimensional structure.</p>