Acta Crystallographica Section E

Structure Reports Online

Volume 61, Part 3 (March 2005)

inorganic compounds

wm6052 scheme

Acta Cryst. (2005). E61, i38-i40 [ doi:10.1107/S1600536805005088 ]

Ammonium chlorite, NH₄ClO₂, at 150 K

A. I. Smolentsev and D. Y. Naumov

Abstract: The structure of tetragonal (P $\overline 4$ 2₁m) ammonium chlorite, NH₄ClO₂, has been redetermined by single-crystal X-ray analysis with higher precision. The NH₄⁺ cation is at a site of $\overline 4$ symmetry, while the unique Cl and O atoms are at sites with symmetries mm and m, respectively. The structure consists of corrugated layers of NH₄⁺ cations coordinated by ClO₂^- anions. The H atoms of the ammonium cation hydrogen bond to four chlorite O atoms. The resultant coordination is almost ideal tetrahedral.

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