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प्रश्न
\[\ce{CH3 - CH = CH2 ->[HI][Peroxide]}\]
The major product of the above reaction is,
पर्याय
\[\ce{I - CH2 - CH = CH2}\]
\[\ce{CH3 - CH2 - CH2I}\]
\[\begin{array}{cc}
\ce{CH3-CH-CH3}\\
|\\
\ce{I}\end{array}\]\[\begin{array}{cc}
\ce{CH3-CH-CH2}\\
\phantom{.....}|\phantom{.....}|\\
\phantom{.......}\ce{I}\phantom{....}\ce{OH}
\end{array}\]
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उत्तर
\[\begin{array}{cc}
\ce{CH3-CH-CH3}\\
|\\
\ce{I}\end{array}\]
Explanation:
Identify the effect of peroxide
-
The peroxide (anti-Markovnikov) or Kharasch effect occurs only with HBr.
-
It does not occur with HCl or HI, because the free-radical mechanism is not energetically favorable for these acids.
With HI, the reaction follows the normal (Markovnikov) addition rule, not the peroxide effect.
Hydrogen (H) attaches to the carbon having more hydrogens, and iodine (I) attaches to the more substituted carbon of the double bond.
\[\ce{CH 3 - CH = CH 2 + HI -> CH 3 - CHI - CH 3}\]
This compound is 2-iodopropane.
Reason: Peroxide effect does not operate with HI, so normal (Markovnikov) addition occurs.
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संबंधित प्रश्न
Choose the most correct option.
The best method for the preparation of alkyl fluorides is _______.
The product ‘B’ in the above reaction sequence is,
Choose the most correct option.
Which of the following is likely to undergo racemization during alkaline hydrolysis?
(I)
\[\begin{array}{cc}
\ce{CH3-CH-C2H5}\\
|\\
\ce{Cl}\end{array}\]
(II)
(III)
(IV)
\[\begin{array}{cc}
\ce{\phantom{.......}CH3}\\
\phantom{.....}|\\
\ce{CH3-CH}\\
\phantom{.....}|\\
\ce{\phantom{..........}CH2Cl}
\end{array}\]
Match the pairs.
| Column I | Column II |
| \[\begin{array}{cc} \ce{CH3CH - CH3}\\ |\phantom{.....}\\ \ce{X\phantom{.....}} \end{array}\] |
vinyl halide |
| \[\ce{CH2 = CH - CH2X}\] | alkyl halide |
| \[\ce{CH2 = CH - X}\] | allyl halide |
| benzyl halide | |
| aryl halide |
The type of mono halogen derivative in which a halogen atom is bonded to sp3 hybridized carbon atom next to carbon-carbon double bond is ______________
The common name of 1-chloro-2, 2-dimethyl propane is ______.
When propene reacts with HCl in presence of peroxide, the product is ________.
Identify A in the following reaction,
\[\ce{A ->[KCN (alcoholic)][\Delta] Propane nitrile +Potassium bromide}\]
Alkyl chloride containing 4° carbon atom(s) would be ____________.
Which of the following compounds is obtained when t-butyl bromide is treated with alcoholic ammonia?
The number of possible monohalogen derivatives for the alkyl halide having molecular formula C4H9X is ____________.
What is the IUPAC name of neopentyl chloride?
How many asymmetric carbon atoms are present in neopentyl chloride?
Identify A and B respectively in the following conversion.
\[\ce{Ethene ->[A] Bromoethane ->[B][\Delta] Ethyl propionate}\]
The decreasing order of the rate of nitration of benzene (I), C6D6 (II), nitrobenzene (III), chlorobenzene (IV) is ______.
The allylic halide, among the following, is ______.
Complete the following reaction giving major product.
\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{...................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry either] A}\\
|\phantom{...................}\\
\ce{CH3}\phantom{.................}
\end{array}\]
Identify the chiral molecule from the following.
Identify the chiral molecule from the following.
Identify the chiral molecule from the following.
Among the following vinylic halide is ______.
Name the following halide according to IUPAC system and classify them as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides:
\[\ce{CH3C(C2H5)2CH2Br}\]
