Which of the following has the lowest barrier | vedclass

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

Question

(C) The rotational barrier is determined by steric hindrance and the electronic nature of the bond. $A$: Cyclopentane has a cyclic structure,and rotat

Vedclass · Accepted Answer

n-Butane (bond between $C_2$ and $C_3$)

Vedclass · Answer

(C) The rotational barrier is determined by steric hindrance and the electronic nature of the bond. $A$: Cyclopentane has a cyclic structure,and rotation about a $C-C$ bond is restricted by the ring strain. $B$: Buta$-1,3-$diene has partial double-bond character between $C_2$ and $C_3$ due to conjugation,leading to a high rotational barrier. $C$: $n$-Butane $(CH_3-CH_2-CH_2-CH_3)$ has a simple $sp^3-sp^3$ single bond with minimal steric hindrance compared to the other options,resulting in the lowest rotational energy barrier. $D$: $2,3-$Dimethylbutane has significant steric repulsion between the bulky methyl groups during rotation,leading to a higher barrier than $n$-butane.

Which of the following has the lowest barrier to rotation about the indicated bond?

Similar Questions

The addition of oxygen to the reaction mixture of methane and chlorine in $photochemical \ chlorination$:

Arrange the following alkanes in order of their boiling points:
$A$. Pentane
$B$. $2-$Methylbutane
$C$. $2,2-$Dimethylpropane

For complete combustion of $10 \ L$ of alkane,the volume of oxygen required is $50 \ L$. Identify the alkane.

$(CH_3)_2CHBr$ $\xrightarrow[(2) CuI]{(1) Li} (A)$ $\xrightarrow{(CH_3)_2CHCH_2Br} B$.
$'B'$ is

Which of the following alkanes cannot be made in good yield by the Wurtz reaction?

Vedclass Test Series

Exam Paper Generator

Online Exam Module