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  1. Pyridine is protonated by reaction with acids and forms a positively charged aromatic polyatomic ion called a pyridinium cation. This cation is the conjugate acid of pyridine and its pKa has a value of 5.30.
    www.newworldencyclopedia.org/entry/Pyridine
    Containing a pyridinium ion, pyridinium chloride has a pK a of approximately 5, slightly more acidic than that of typical amines.
    en.wikipedia.org/wiki/Pyridinium_chloride
    The pKa of the conjugate corrosive (the pyridinium cation) is 5.25.
    www.vedantu.com/chemistry/pyridine
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    Pyridinium - Wikipedia

    Pyridinium refers to the cation [C5H5NH] . It is the conjugate acid of pyridine. Many related cations are known involving substituted pyridines, e.g. picolines, lutidines, collidines. They are prepared by treating pyridine with acids. As pyridine is often used as an organic base in chemical reactions, pyridinium salts are … See more

    When the acidic proton is replaced by alkyl, the compounds are called N-alkylpyridinium. A simple representative is N-methylpyridinium ([C5H5NCH3] ). These pyridinium … See more

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  4. pKaH of pyridine versus other imines - Chemistry Stack …

    Typically, imines have a pKa between 5 and 7, so this seems unusually high for a start. If this number is wrong then it means that pyridine may have quite a typical pKa for a cyclic imine of this type.

  5. 1.7: Equilibrium and pKa - Chemistry LibreTexts

    The ethane thiol has a higher pK a than the pyridinium ion, so it will keep its proton, not give it away. However, the difference between the numbers isn't that large. Maybe there will be a measurable equilibrium, meaning an equilibrium …

  6. Calculations of p Ka Values of Selected Pyridinium and Its N

  7. Solution Containing a Conjugate Pair (Buffer ... - Chemistry …

  8. Bordwell pKa Table - Organic Chemistry Data

    Oct 27, 2017 · This page by Professor Hans Reich (UW-Madison) provides a collection of common structural motifs in Organic Chemistry and their corresponding pKa values.

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