Preparation and properties of ammonium hexachlorozirconate(IV) and its reaction with gaseous ammonia.
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概要
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Ammonium hexachlorozirconate (NH<SUB>4</SUB>)<SUB>2</SUB>ZrCl<SUB>6</SUB> was prepared by the direct reaction of ZrCl<SUB>4</SUB> with NH<SUB>4</SUB>Cl. The X-ray powder diffraction and the density measurements showed that it has a face-centered cubic lattice with <I>a</I>=10.127(2) Å and is isostructural with K<SUB>2</SUB>PtCl<SUB>6</SUB>. The hexachlorozirconate undergoes ammonolysis in gaseous ammonia at room temperature, forming ZrCl<SUB>3</SUB>(NH<SUB>2</SUB>)·<I>x</I>NH<SUB>3</SUB> and NH<SUB>4</SUB>Cl. The ammonolysis product reverts to the initial (NH<SUB>4</SUB>)<SUB>2</SUB>ZrCl<SUB>6</SUB> on heating to 250 °C in the ammonia atmosphere. The hexachlorozirconate vaporizes at about 450 °C. The reaction of ZrCl<SUB>4</SUB> with gaseous ammonia was also studied in comparison with that of the hexachlorozirconate.
- 公益社団法人 日本化学会の論文
著者
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Yamanaka Shoji
Department Of Applied Chemistry Faculty Of Engineering Hiroshima University
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Hattori Makoto
Department Of Agricultural Chemistry The University Of Tokyo
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Morimoto Yuhki
Department of Applied Chemistry, Faculty of Engineering, Hiroshima University
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Ohashi Masao
Department of Applied Chemistry, Faculty of Engineering, Hiroshima University
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