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ammonium group |
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ammonium group, in chemistry, a positively charged nitrogen atom joined by single bonds to four other atoms or groups. The simplest ammonium group, NH4+, is formed by protonation protonation (prō`tənā'shən), in chemistry, addition of a proton to an atom, molecule, or ion. ..... Click the link for more information. of ammonia ammonia, chemical compound, NH3, colorless gas that is about one half as dense as air at ordinary temperatures and pressures. It has a characteristic pungent, penetrating odor. ..... Click the link for more information. , NH3, e.g., by its reaction with hydrogen chloride, HCl, to form ammonium chloride, NH4Cl, an ammonium compound. Organic ammonium compounds are formed by the reaction of an alkyl halide with an amine (see amino group amine. Amines are derivatives of the inorganic compound ammonia , NH3. When one, two, or all three of the hydrogens in ammonia are replaced by an alkyl or aryl group, the resulting compound is known as a primary, secondary, or tertiary amine, respectively. ..... Click the link for more information. ), for example, ethyl chloride, C2H5Cl, reacts with triethylamine, (C2H5)3N, to form tetraethyl ammonium chloride, (C2H5)4N+Cl−. They are also formed by reaction of an amine with a mineral acid or by reaction of an alkyl halide with ammonia. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| ? Mentioned in | ? References in periodicals archive | |
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In addition, they evaluated a
methylated SMA imide resin, SMA IQ, which has a styrene to maleimide
ratio of 1/2 but has an extra methyl group bonded to the nitrogen atom
in the ammonium group. |
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