Oxonium ions from aqua regia: Isolation by hydrogen bonding to crown ethers

Maria de Lluch Calleja Cortes, K. Johnson, W. J. Belcher, J. W. Steed*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

The preparation and structures of a variety of oxonium ion tetrachloroaurate(III) salts isolated from aqua regia are reported. The new compounds are [(H5O2)2(12-crown-4)2] [AuCl4]2 (1), [(H7O3)(15-crown-5)][AuCl4] (2), [(H5O2)(benzo-15-crown-5)2] [AuCl4] (3), [(H3O)(18-crown-6)][AuCl4] (4), [(H5O2)(dibenzo-24-crown-8)][AuCl4] (5), [(H5O2)(4-nitrobenzo-15-crown-5)2] [AuCl4] (6), [(H3O)(4-nitrobenzo-18-crown-6)][AuCl4] (7), [(H11O5)-(tetrachlorodibenzo-18-crown-6)2] [AuCl4] (8), and [(H7O3)(dinitrodibenzo-30-crown-10)][AuCl4] (9). A significant correlation between the degree of proton hydration and crown ether size is observed. Aryl crown ethers are nitrated in concentrated aqua regia, but nonnitrated products may be obtained in a dilute solution of aqua regia by reaction with aqueous HAuCl4.

Original languageEnglish (US)
Pages (from-to)4978-4985
Number of pages8
JournalInorganic Chemistry
Volume40
Issue number19
DOIs
StatePublished - Sep 10 2001

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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