Given the following structures:(I) 1,3,5-trim | vedclass

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

Question

(D) The enthalpy of hydrogenation is inversely proportional to the stability of the alkene/diene system.$(I)$ is an aromatic compound (mesitylene),whi

Vedclass · Accepted Answer

$III > II > I$

Vedclass · Answer

(D) The enthalpy of hydrogenation is inversely proportional to the stability of the alkene/diene system.$(I)$ is an aromatic compound (mesitylene),which is highly stable due to resonance energy.$(II)$ is a conjugated diene system with some cross-conjugation,making it less stable than the aromatic system but more stable than the isolated exocyclic double bonds.$(III)$ contains three isolated exocyclic double bonds,which are the least stable among the three.Stability order: $I > II > III$.Since enthalpy of hydrogenation is inversely proportional to stability,the order of enthalpy of hydrogenation is $III > II > I$.

Given the following structures:
$(I)$ $1,3,5-$trimethylbenzene (mesitylene)
$(II)$ $1,3-$dimethyl$-5-$methylenecyclohexa$-1,3-$diene
$(III)$ $1,3,5-$trimethylenecyclohexane
The enthalpy of hydrogenation of these compounds will be in the order as:

Similar Questions

Identify the molecular formula of pyridine from the following.

The reaction of benzene with $CH_2Cl_2$ in the presence of $AlCl_3$ gives product $A$. Identify $A$.

Which of the following will be easily nitrated?

Which of the following statements is correct regarding the nitration of aromatic compounds?

What is the number of $\sigma$ and $\pi$ bonds in benzene $(C_6H_6)$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Given the following structures:$(I)$ $1,3,5-$trimethylbenzene (mesitylene)$(II)$ $1,3-$dimethyl$-5-$methylenecyclohexa$-1,3-$diene$(III)$ $1,3,5-$trimethylenecyclohexaneThe enthalpy of hydrogenation of these compounds will be in the order as: