The persistence of these compounds is due to the high resistance to oxidation, reduction, addition, elimination and electrophilic substitution.
12.
While I'm on the subject of Chemistry, can we do something about the electrophilic substitution and electrophilic aromatic substitution pages?
13.
The calculated pi-electron density marks C5 as the primary site for electrophilic substitution, and C2 as the site for nucleophilic substitution.
14.
Like durene ( 1, 2, 4, 5-tetramethylbenzene ), pentamethylbenzene is rather electron-rich and undergoes electrophilic substitution readily.
15.
Electrophilic substitution is the counterpart of the nucleophilic substitution in that the attacking atom or molecule, an electrophile, has low electron density and thus a positive charge.
16.
If the addition of a functional group takes place at the less substituted carbon atom of the double bond, then the electrophilic substitution with acids is not possible.
17.
Ordinary electrophilic substitutions with an activating group show preference for both the ortho and para position, this reaction demonstrates increased regioselectivity because the ortho position alone is targeted.
18.
The main building blocks for biosynthesis of elymoclavine are tryptophan ( Trp ) and DMAPP . DMATrp is obtained after electrophilic substitution followed by addition ( Step A below ).
19.
I understand in some reactions, the acids form reactive intermediates after being protonated, and it is them and not the protons that carry out the reaction, especially in electrophilic substitution.
20.
Since the pyrrollic ring is the most reactive portion of indole, electrophilic substitution of the carbocyclic ( benzene ) ring generally takes place only after N1, C2, and C3 are substituted.
