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The detailed (and as complete as possible) description of plausible or observable pathways leading from reactants to products of a chemical process. This tag should be applied to questions about these processes. It may be applied to hypothetical and/or proposed mechanisms.

7
votes
The 4th and the last structures are same but the last two steps are not superfluous, because the 4th structure is consumed right after it is generate and will not persist while after addition of acid, …
answered Jun 14 '15 by Ian Fang
7
votes
This is the Friedel-Crafts acylation reaction of alkene. Catalyzed by Lewis acid. Addition-elimination mechanism.
answered May 24 '14 by Ian Fang
1
vote
All nucleophiles are Lewis bases. They are just electron pair donor. A molecule or ion is called a "base" (or, “Brønsted base”) when it interact with proton, it is called a "nucleophile" when it inte …
answered May 11 '14 by Ian Fang
1
vote
Where did you find the statement: "all substitution reactions on methyl go through $S_N1$"? It is obviously wrong. Methyl definitely favor $S_N2$. Here is the answer. The conversion from $\ce{MeCl}$ …
answered Apr 16 '15 by Ian Fang
6
votes
The mechanism is electron transfer. The imine will take one electron from metal to form a radical anion ($\ce{.CR2-NR'^{-}}$) intermediate; the $\ce{-NR'^{-}}$ will grab one proton from solvent to giv …
answered Aug 7 '13 by Ian Fang