Reversible extrusion and uptake of HCl molecules by crystalline solids involving coordination bond cleavage and formation

G.M. Espallargas, L. Brammer, J. van de Streek, K. Shankland, A.J. Florence, H. Adams

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

Yellow crystalline salts (3-XpyH)2[CuCl4] (3-XpyH = 3-halopyridinium, X = Cl, Br) lose HCl upon exposure to air in an open vessel, yielding quantitatively blue crystalline coordination compounds [CuCl2(3-Xpy)2]. The reaction is prevented if the vessel is sealed, but can be driven forward under such conditions by providing a trapping agent for HCl, such as an aqueous solution of AgNO3. The reaction requires cleavage of Cu-Cl and N-H bonds and formation of Cu-N bonds. The metal coordination geometry also changes from distorted tetrahedral to square planar. Remarkably, the reaction is fully reversible upon exposure of the blue coordination compound to vapor from a concentrated aqueous solution of HCl, and the initial yellow crystalline salt results. The structural changes occurring in these reactions have been followed by X-ray powder diffraction, including Rietveld refinement, of the crystal structures.
Original languageEnglish
Pages (from-to)9584-85
Number of pages9499
JournalJournal of American Chemical Society
Volume128
Issue number30
DOIs
Publication statusPublished - 2006

Keywords

  • applied physiology
  • pharmacology
  • chemistry
  • bond cleavage
  • HCl molecules

Fingerprint Dive into the research topics of 'Reversible extrusion and uptake of HCl molecules by crystalline solids involving coordination bond cleavage and formation'. Together they form a unique fingerprint.

Cite this