Oxonium Ions from Aqua Regia: Isolation by Hydrogen Bonding to Crown Ethers

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• 作者：Maria Calleja ; Karin Johnson ; Warwick J. Belcher ; and Jonathan W. Steed
• 刊名：Inorganic Chemistry
• 出版年：2001
• 出版时间：September 10, 2001
• 年：2001
• 卷：40
• 期：19
• 页码：4978 - 4985
• 全文大小：169K
• 年卷期：v.40,no.19(September 10, 2001)
• ISSN：1520-510X

文摘

The preparation and structures of a variety of oxonium ion tetrachloroaurate(III) salts isolated from aqua regiaare 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 significantcorrelation between the degree of proton hydration and crown ether size is observed. Aryl crown ethers are nitratedin concentrated aqua regia, but nonnitrated products may be obtained in a dilute solution of aqua regia by reactionwith aqueous HAuCl₄.