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Carboxylic acids having at least one alp...

Carboxylic acids having at least one `alpha`-hydrogen react with `Cl_(2)` or `Br_(2)` in the presence of phosphorous to give `alpha`-halo acids. The reaction is known as Hell -volhar-Zelinsky reaction (HVZ reaction).
`R-CH_(2)-CO OH overset(P//Br_(2))underset(Delta)toR-CH(Br)CO OH`
The HVZ reaction is limited to the formation of `alpha`-chloro and `alpha`-bromo acids and it is sometimes backward to carry out. the reagents (`X_(2)` and `P`) are noxious and the reaction time is often long and the conditions of reaction are harsh.
`CH_(3)-CO OH overset(Br_(2)//P)to(A) overset(NaCN)to(B) overset(HOH//H^(+))to(C)`
The product (C) will be

A

B

C

D

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A
(a)
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Carboxylic acids having at least one alpha -hydrogen react with Cl_(2) or Br_(2) in the presence of phosphorous to give alpha -halo acids. The reaction is known as Hell -volhar-Zelinsky reaction (HVZ reaction). R-CH_(2)-CO OH overset(P//Br_(2))underset(Delta)toR-CH(Br)CO OH The HVZ reaction is limited to the formation of alpha -chloro and alpha -bromo acids and it is sometimes backward to carry out. the reagents ( X_(2) and P ) are noxious and the reaction time is often long and the conditions of reaction are harsh. Which of the following carboxylic acids will not give HVZ reaction ?

Carboxylic acids having at least one alpha -hydrogen react with Cl_(2) or Br_(2) in the presence of phosphorous to give alpha -halo acids. The reaction is known as Hell -volhar-Zelinsky reaction (HVZ reaction). R-CH_(2)-CO OH overset(P//Br_(2))underset(Delta)toR-CH(Br)CO OH The HVZ reaction is limited to the formation of alpha -chloro and alpha -bromo acids and it is sometimes backward to carry out. the reagents ( X_(2) and P ) are noxious and the reaction time is often long and the conditions of reaction are harsh. Which of the following will be obtained when acetic acid is subjected to HVZ reaction ?

Carboxylic acids having atleast one alpha -hydrogen react with Cl_(2) or Br_(2) in the presence of phosphorus ( or a phosphorus halide) to give alpha -halo acids. This reaction is known as Hell-Volhard-Zelinsky reaction (HVZ reaction), R-CH_(2)COOHunderset(Delta)overset(P//Br_(2))toR-overset(Br)overset(|)"CH"-COOH The HVZ reaction is limited to the formation of alpha -chloro and a-bromo acids and it is sometimes awkward to carry out. The reagents ( X_(2) and P) are noxious and the reaction time is often long and the conditions of reaction are harsh. CH_(3)COOHoverset(Br_(2)//Red P)to(A)overset(NaCN)to(B)overset(HOH//H^(+))to(C ) The product (C) will be:

Carboxylic acids having atleast one alpha -hydrogen react with Cl_(2) or Br_(2) in the presence of phosphorus ( or a phosphorus halide) to give alpha -halo acids. This reaction is known as Hell-Volhard-Zelinsky reaction (HVZ reaction), R-CH_(2)COOHunderset(Delta)overset(P//Br_(2))toR-overset(Br)overset(|)"CH"-COOH The HVZ reaction is limited to the formation of alpha -chloro and a-bromo acids and it is sometimes awkward to carry out. The reagents ( X_(2) and P) are noxious and the reaction time is often long and the conditions of reaction are harsh. CH_(3)CH_(2)COOHoverset(Red P +Br_(2))to(A)overset(alc. KOH)(B) . The product (B) is :

Carboxylic acids having atleast one alpha -hydrogen react with Cl_(2) or Br_(2) in the presence of phosphorus ( or a phosphorus halide) to give alpha -halo acids. This reaction is known as Hell-Volhard-Zelinsky reaction (HVZ reaction), R-CH_(2)COOHunderset(Delta)overset(P//Br_(2))toR-overset(Br)overset(|)"CH"-COOH The HVZ reaction is limited to the formation of alpha -chloro and a-bromo acids and it is sometimes awkward to carry out. The reagents ( X_(2) and P) are noxious and the reaction time is often long and the conditions of reaction are harsh. R- CH_(2)-CH_(2)-OHto R-CH_(2) -CH_(2) - COOH In above conversion, the reactant (A) follows the sequence of reactions with three reagents

Carboxylic acids having at least one alpha -hydrogen react with Cl_(2)" or "Br_(2) in the presnence of red phosphorus to give alpha -halo acids. The reaction is known as H.V.Z. reaction. The HVZ reaction is limited to the formation of alpha -chloro acid and alpha -bromo acid and it is sometimes difficult to carry out the reaction. Answer the following questions : Which of the following carboxylic acids will not give HVZ reaction ?

CH_(3)COOH overset(P//Br_(2))toCH_(2)BrCOOH . The reaction is called:

Predict the product 'C' in the following chain of the reactions: CH_(3)CH_(2)COOHoverset(Red P//Br_(2))to(A)overset(KCN)to(B)underset(Delta)overset(HOH//H^(+))to(C )

Consider the following reaction H_(2)C=CH-CH_(2)CH_(2)-OH overset(Br_(2)//C Cl_(4))to A underset(25^(@)C)overset(Dil.KOH)to B The product B is:

DINESH PUBLICATION-CARBOXYLIC ACIDS -MULTIPLE CHOICE QUESTION BANK (MCQB)
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