998 resultados para HD5119.W6 N3
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1904/03 (N3).
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1900/03 (N3).
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1893/03 (N3).
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1909/03 (N3).
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1897/03 (N3).
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1902/03 (N3).
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1903/03 (A1903,N3).
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1911/03 (N3).
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1907/03 (A1907,N3).
Resumo:
The counteranion exchange of quaternary 1,2,3-triazolium salts was examined using a simple method that permitted halide ions to be swap for a variety of anions using an anion exchange resin (A¯ form). The method was applied to 1,2,3-triazolium-based ionic liquids and the iodideto- anion exchange proceeded in excellent to quantitative yields, concomitantly removing halide impurities. Additionally, an anion exchange resin (N3¯ form) was used to obtain the benzyl azide from benzyl halide under mild reaction. Likewise, following a similar protocol, bis(azidomethyl)arenes were also synthesized in excellent yields. The results of a proton NMR spectroscopic study of simple azolium-based ion pairs are discussed, with attention focused on the significance of the charged-assisted (CH)+···anion hydrogen bonds of simple azolium systems such as 1-butyl-3-methylimidazolium and 1-benzyl-3-methyl-1,2,3-triazolium salts.
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1912/03 (A1912,N3).
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1890/03 (N3).
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1892/12/20 (A7,N3).
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1893/12/20 (A8,N3).
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1887/12/20 (A2,N3).