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प्रश्न
What is the action of following on ethyl bromide?
alcoholic sodium hydroxide
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उत्तर
When ethyl bromide is boiled with an alcoholic solution of sodium hydroxide \[\ce{(NaOH)}\], an alkene is formed due to the elimination of hydrogen atoms from carbon and halogen from α-carbon, which is called dehydrohalogenation.
\[\ce{\underset{(Ethyl bromide)}{\overset{\beta\phantom{.............}\alpha\phantom{............}}{CH3 - CH2 - Br}} + \underset{(alc.)}{NaOH} ->[\Delta] \underset{(Ethene)}{CH2 = CH2} + NaBr + H2O}\]
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संबंधित प्रश्न
Complete the following reaction giving major product.
\[\begin{array}{cc}\ce{CH3\phantom{................}}\\
|\phantom{...................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether] A}\\
|\phantom{...................}\\
\ce{CH3\phantom{................}}
\end{array}\]
Arrange the following in the increasing order of boiling points.
- 1-Bromopropane
- 2- Bromopropane
- 1- Bromobutane
- 1-Bromo-2-methylpropane
Give reasons:
Haloarenes are less reactive than haloalkanes.
Distinguish between SN1 and SN2 mechanism of substitution reaction.
Convert the following:
Benzyl alcohol to benzyl cyanide
Convert the following:
2-Chloropropane to propan-1-ol
HCl is added to a hydrocarbon ‘A’ \[\ce{(C4H8)}\] to give a compound ‘B’ which on hydrolysis with aqueous alkali forms tertiary alcohol ‘C’ \[\ce{(C4H10O)}\]. Identify ‘A’ ,‘B’ and ‘C’.
Complete the following reaction sequence by writing the structural formulae of the organic compound 'A', 'B' and 'C'.
\[\ce{2-Bromobutane->[Alc.KOH]A->[][Br2]B->[][NaNH2]C}\]
Propane nitrile can be prepared by heating ____________
The following will react faster by SN1 mechanism
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Which of the following is least reactive towards SN1 reactions?
The following mechanism has been proposed for the reaction of NO2 with F2 to form NO2F:
\[\ce{NO2_{(g)} + F2_{(g)} -> NO2F_{(g)} + F_{(g)} (slow)}\]
\[\ce{F_{(g)} + NO2_{(g)} -> NO2F_{(g)} (fast)}\]
The order of the reaction with respect to NO2(g)
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\[\ce{2-Bromobutane ->[KOH alc.][\Delta] A ->[HI] B}\]
Which of the following statements is incorrect regarding the dehydrohalogenation of alkenes?
The order of reactivity of the given haloalkanes towards nucleophiles is:
Which among the following statements is not correct about SN2 reaction mechanism?
Complete the following reactions giving a major product.
\[\begin{array}{cc}
\ce{CH3}\phantom{................}\\
|\phantom{..................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether] A}\\
|\phantom{..................}\\
\ce{CH3}\phantom{................}
\end{array}\]
Complete the following reaction, giving a major product.
\[\begin{array}{cc}
\ce{CH3}\phantom{................}\\
|\phantom{...................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether] A}\\
|\phantom{...................}\\
\ce{CH3}\phantom{................}
\end{array}\]
Complete the following reaction giving major product.
\[\begin{array}{cc}
\ce{CH3}\phantom{...............}\\
|\phantom{..................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether]A}\\
|\phantom{...................}\\
\ce{CH3}\phantom{.................}
\end{array}\]
Complete the following reaction giving major product.
\[\begin{array}{cc}
\ce{CH3}\phantom{................}\\
|\phantom{..................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether]A}\\
|\phantom{..................}\\
\ce{CH3}\phantom{................}
\end{array}\]
Give a reason for the following:
Ethoxy ethane with conc. HI at 373 K gives C2H5OH and CH3I but not CH3OH and C2H5I.
Which of the following pair of compounds on heating gives butanenitrile?
