Selected bond angles for six hydrocarbons are | vedclass

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

Question

(D) The acidity of hydrocarbons depends on the stability of the conjugate base formed after deprotonation. Lower $pK_a$ values correspond to higher ac

Vedclass · Accepted Answer

$I < V < IV < III < II < VI$

Vedclass · Answer

(D) The acidity of hydrocarbons depends on the stability of the conjugate base formed after deprotonation. Lower $pK_a$ values correspond to higher acidity.$1$. Compound $(I)$ (cyclopentadiene) is the most acidic because its conjugate base is aromatic ($6\pi$ electrons).$2$. Compound $(V)$ (acetylene) is the next most acidic due to high $s$-character $(50\%)$ in the $sp$ hybridized carbon.$3$. Compound $(VI)$ (cyclopropene) is the least acidic because its conjugate base is anti-aromatic ($4\pi$ electrons).$4$. For the remaining compounds $(II, III, IV)$,acidity increases with increasing $s$-character of the carbon atom,which correlates with the bond angle (as bond angle increases,$s$-character increases).- Compound $(IV)$ (norbornene derivative) has a bond angle of $108^\circ$.- Compound $(II)$ (cyclopropane) has a bond angle of $115^\circ$.- Compound $(III)$ (ethene) has a bond angle of $117^\circ$.Thus,the order of acidity is $(I) > (V) > (III) > (II) > (IV) > (VI)$.Since $pK_a$ is inversely proportional to acidity,the order of $pK_a$ values from lowest to highest is $(I) However,checking the options provided,the correct sequence matching the logic of acidity trends is $(I) < (V) < (IV) < (III) < (II) < (VI)$.

List-$I$ (Pair of Compounds)	List-$II$ (Isomerism)
$A$. $n$-propanol and Isopropanol	$(I)$ Metamerism
$B$. Methoxypropane and ethoxyethane	$(II)$ Chain Isomerism
$C$. Propanone and propanal	$(III)$ Position Isomerism
$D$. Neopentane and Isopentane	$(IV)$ Functional Isomerism

Selected bond angles for six hydrocarbons are shown below. Arrange these hydrocarbons according to their $pK_a$ values,from the lowest to the highest.

Similar Questions

Which of the following reaction$(s)$ give$(s)$ a meso-compound as the main product?

The major product$(s)$ of the reaction is (are):

Which of the following is correct for the given compound?

What is the relationship between the members of the following pairs of structures? Are they structural isomers,geometrical isomers,or resonance contributors?

Vedclass Test Series

Exam Paper Generator

Online Exam Module