Medium
What is a conjugated system? Give examples and explain its effect.
(N/A) Conjugated system: The presence of alternating single and double bonds in an open chain or cyclic system is termed as a conjugated system.
Examples: $1,3-$butadiene $(CH_2=CH-CH=CH_2)$,aniline $(C_6H_5NH_2)$,and nitrobenzene $(C_6H_5NO_2)$ contain conjugated systems.
Effect: In such systems,the $\pi$-electrons are delocalized across the conjugated framework. This delocalization leads to increased stability of the molecule and can result in the development of polarity within the system.
Examples: $1,3-$butadiene $(CH_2=CH-CH=CH_2)$,aniline $(C_6H_5NH_2)$,and nitrobenzene $(C_6H_5NO_2)$ contain conjugated systems.
Effect: In such systems,the $\pi$-electrons are delocalized across the conjugated framework. This delocalization leads to increased stability of the molecule and can result in the development of polarity within the system.
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Similar Questions
Represent hyperconjugation in $CH_3-CH_2^+$ and $CH_3-CH=CH_2$ by figure.
Easy
View SolutionWhich of the following statements is $NOT$ correct?
Show the polarisation of the carbon-magnesium bond in the following structure: $CH_3-CH_2-CH_2-CH_2-MgX$.
Medium
View SolutionArrange the following according to the instructions:
$(i)$ Arrange in descending order of acidic strength:
$CH_3COOH, (CH_3)_3CCOOH, (CH_3)_2CHCOOH, CH_3CH_2COOH$
(ii) Arrange in descending order of stability:
$\stackrel{+}{CH}_3, (CH_3)_3\stackrel{+}{C}, CH_3CH_2^+, (CH_3)_2\stackrel{+}{CH}$
(iii) Arrange in increasing order of acidic strength:
$CCl_3COOH, CH_3COOH, CHCl_2COOH, CH_2ClCOOH$
(iv) Arrange in increasing order of stability:
$(a)$ $CH_3CH=CH-CHO$
$(b)$ $CH_3\stackrel{+}{CH}-CH=C-O:^-$
$(c)$ $\stackrel{+}{CH}_2-CH=CH-C=O$
$(v)$ Arrange in decreasing order of stability:
$(I)$ $CH_2=CH-CHO$
$(II)$ $\stackrel{+}{CH}_2-CH=C-H$ (with $O^-$)
$(III)$ $:CH_2-CH=C-H$ (with $O^-$)
$(i)$ Arrange in descending order of acidic strength:
$CH_3COOH, (CH_3)_3CCOOH, (CH_3)_2CHCOOH, CH_3CH_2COOH$
(ii) Arrange in descending order of stability:
$\stackrel{+}{CH}_3, (CH_3)_3\stackrel{+}{C}, CH_3CH_2^+, (CH_3)_2\stackrel{+}{CH}$
(iii) Arrange in increasing order of acidic strength:
$CCl_3COOH, CH_3COOH, CHCl_2COOH, CH_2ClCOOH$
(iv) Arrange in increasing order of stability:
$(a)$ $CH_3CH=CH-CHO$
$(b)$ $CH_3\stackrel{+}{CH}-CH=C-O:^-$
$(c)$ $\stackrel{+}{CH}_2-CH=CH-C=O$
$(v)$ Arrange in decreasing order of stability:
$(I)$ $CH_2=CH-CHO$
$(II)$ $\stackrel{+}{CH}_2-CH=C-H$ (with $O^-$)
$(III)$ $:CH_2-CH=C-H$ (with $O^-$)
Medium
View SolutionGiven below are two statements:
Statement $I:$ Hyperconjugation is a permanent effect.
Statement $II:$ Hyperconjugation in ethyl cation $(CH_{3}CH_{2}^{+})$ involves the overlapping of $C_{sp^{3}}-H_{1s}$ bond with the empty $2p$ orbital of the adjacent carbon.
Choose the correct option:
Statement $I:$ Hyperconjugation is a permanent effect.
Statement $II:$ Hyperconjugation in ethyl cation $(CH_{3}CH_{2}^{+})$ involves the overlapping of $C_{sp^{3}}-H_{1s}$ bond with the empty $2p$ orbital of the adjacent carbon.
Choose the correct option:
DifficultJEE MAIN 2021
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