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Abstract <p>Cocrystals of hydroxylammonium chloride with hydroxylamine in 1:1 (NH<sub>3</sub>OHCl·NH<sub>3</sub>O, structure <b>I</b>) and 2:1 (2(NH<sub>3</sub>OHCl)·NH<sub>3</sub>O, structure <b>II</b>) ratios are prepared and structurally characterized. The structures of both cocrystals are determined by XRD: the structures crystallize in the monoclinic crystal system, both in the <i>P</i>2<sub>1</sub>/<i>c</i> space group. It is established that the NH<sub>3</sub>O ammonia oxide zwitter ion forms an exceptionally large number of contacts (11 in <b>I</b> and 12 in <b>II</b>). The main differences between the structures of <b>I</b> and <b>II</b> are manifested in the supramolecular organization of their crystal packings: hydroxylamine acts as a hydrogen donor for four hydrogen bonds and a hydrogen acceptor for other four hydrogen bonds in <b>I</b> and as a hydrogen donor for six hydrogen bonds and a hydrogen acceptor for three hydrogen bonds in <b>II</b>.</p>

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Crystal Structures of the NH3OHCl·NH3O and 2(NH3OHCl)·NH3O Hydroxylamine Hydrochloride Hydroxylaminosolvates

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • M. A. Navasardyan

摘要

Abstract

Cocrystals of hydroxylammonium chloride with hydroxylamine in 1:1 (NH3OHCl·NH3O, structure I) and 2:1 (2(NH3OHCl)·NH3O, structure II) ratios are prepared and structurally characterized. The structures of both cocrystals are determined by XRD: the structures crystallize in the monoclinic crystal system, both in the P21/c space group. It is established that the NH3O ammonia oxide zwitter ion forms an exceptionally large number of contacts (11 in I and 12 in II). The main differences between the structures of I and II are manifested in the supramolecular organization of their crystal packings: hydroxylamine acts as a hydrogen donor for four hydrogen bonds and a hydrogen acceptor for other four hydrogen bonds in I and as a hydrogen donor for six hydrogen bonds and a hydrogen acceptor for three hydrogen bonds in II.