Among the following cyclic ions,which exhibit | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) To determine aromaticity,a molecule must follow $H$ückel's rule: it must be cyclic,planar,fully conjugated,and contain $(4n + 2) \pi$ electrons.$(

Vedclass · Accepted Answer

$Q$ and $R$

Vedclass · Answer

(C) To determine aromaticity,a molecule must follow $H$ückel's rule: it must be cyclic,planar,fully conjugated,and contain $(4n + 2) \pi$ electrons.$(P)$ Cyclopentadienyl cation: It has $4 \pi$ electrons. It is anti-aromatic.$(Q)$ Cyclopentadienyl anion: It has $6 \pi$ electrons ($4$ from double bonds + $2$ from the lone pair on the $sp^3$ carbon which becomes $sp^2$ to allow conjugation). It is aromatic.$(R)$ Cycloheptatrienyl cation (tropylium ion): It has $6 \pi$ electrons. It is aromatic.$(S)$ Cycloheptatrienyl anion: It has $8 \pi$ electrons. It is anti-aromatic.Thus,$Q$ and $R$ are aromatic.

Among the following cyclic ions,which exhibit aromatic character?

Similar Questions

Enumerate different aromatic electrophilic substitution reactions and provide the reactions that show how the electrophiles $(E^{+})$ are formed.

Consider the following reactions:
$Ethylbenzene \xrightarrow[(ii) H_3O^{+}]{(i) KMnO_4-KOH/\Delta} Y$
$Propylbenzene \xrightarrow[(ii) H_3O^{+}]{(i) KMnO_4-KOH/\Delta} Z$
What are the structures of $Y$ and $Z$?

Out of benzene,$m$-dinitrobenzene and toluene,which will undergo nitration most easily and why?

Which of the following is formed as a result of biological oxidation of benzene in the body of the dog?

Among the following,the aromatic compounds are:

Vedclass Test Series

Exam Paper Generator

Online Exam Module