Synthesis of pyridinium chloride, are you sure you wish to return?
Because this lone pair is not part of the aromatic ring, pyridine is a basehaving chemical properties similar to those of tertiary amines. Substitution of one C—H in pyridine with a second N gives rise to the diazine heterocycles C4H4N2with the names pyridazinepyrimidineand pyrazine.
In some products, the bromide saltcetylpyridinium bromide, is used instead. The bond lengths and bond angles in pyridine and pyridinium are almost identical.
However, because of the separation of the lone pair from the aromatic system of the ring affects, the nitrogen atom cannot exhibit a positive mesomeric effect.
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