CH_3MgBr + text{Cyclopentanone} xrightarrow{H | vedclass

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

Question

(A) $1$. $CH_3MgBr$ reacts with cyclopentanone followed by $H_3O^{+}$ to form $1-$methylcyclopentanol $(A)$.$2$. $1-$methylcyclopentanol $(A)$ reacts

Vedclass · Accepted Answer

$1-$iodo$-1-$methylcyclopentane

Vedclass · Answer

(A) $1$. $CH_3MgBr$ reacts with cyclopentanone followed by $H_3O^{+}$ to form $1-$methylcyclopentanol $(A)$.$2$. $1-$methylcyclopentanol $(A)$ reacts with $HBr$ to form $1-$bromo$-1-$methylcyclopentane $(B)$.$3$. $1-$bromo$-1-$methylcyclopentane $(B)$ reacts with $Mg/	ext{ether}$ to form the Grignard reagent,$1$-methylcyclopentylmagnesium bromide $(C)$.$4$. The Grignard reagent $(C)$ reacts with formaldehyde $(HCHO)$ followed by $H_3O^{+}$ to form ($1$-methylcyclopentyl)methanol $(D)$.$5$. ($1$-methylcyclopentyl)methanol $(D)$ reacts with $HI$ to form $1-$(iodomethyl)$-1-$methylcyclopentane $(E)$.Note: Based on the provided options,the reaction sequence leads to a structure where the methyl group and the iodomethyl group are on the same carbon of the cyclopentane ring. Option $A$ represents $1-$iodo$-1-$methylcyclopentane,which is the product of the first substitution step $(B)$. Re-evaluating the options provided,the structure in option $A$ is the most chemically consistent with the intermediate $B$.

$CH_3MgBr + \text{Cyclopentanone}$ $\xrightarrow{H_3O^{+}} A$ $\xrightarrow{HBr} B$ $\xrightarrow{Mg/\text{ether}} C$ $\xrightarrow{HCHO}_{H_3O^{+}} D$ $\xrightarrow{HI} E$
$E$ is

Similar Questions

$CH_3 CH_2 OH$ $\xrightarrow{Cl_2} CH_3 CHO$ $\xrightarrow{3 Cl_2} Cl_3 CCHO$. In the above reactions,the role of $Cl_2$ in step-$1$ and step-$2$ respectively is:

$CH_3CH_2OH + HX \xrightarrow{ZnX_2} CH_3CH_2 - X + H_2O$. What is the reactivity order of $HX$?

Select the correct statement regarding acid-catalysed dehydration of $tert$-butyl alcohol.

In which of the following reactions of alcohol is there no cleavage of the $C-O$ bond?

Identify $A$ in the given reaction.

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$CH_3MgBr + \text{Cyclopentanone}$ $\xrightarrow{H_3O^{+}} A$ $\xrightarrow{HBr} B$ $\xrightarrow{Mg/\text{ether}} C$ $\xrightarrow{HCHO}_{H_3O^{+}} D$ $\xrightarrow{HI} E$$E$ is