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Curtius and Hofmann Rearrangements

Ethylene chlo...

Question

Ethylene chloro hydrin is the product of following reaction:

A

{C H}_{2} = {C H}_{2} + H O C l

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B

{C H}_{2} = {C H}_{2} + H_{2}

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C

{C H}_{2} = {C H}_{2} + {C l}_{2}

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D

{C H}_{2} = {C H}_{2} + H O B r

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Solution

The correct option is A ${C H}_{2} = {C H}_{2} + H O C l$
Chlorohydrin is the product of a reaction between ethene and hydochlorus acid.
Production of halohydrin:
The reaction of a process:
${C H}_{2} = {C H}_{2} + H O C l \to C H_{2} O H - C H_{2} C l$ (chlorohydrin)

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Q. Complete table.

Chemical reaction	Product	$I U P A C$ name of the product
$C H_{2} = C H_{2} + C l_{2}$	........	........
$C H_{2} = C H_{2} + H C l$	..........	.........
$C H_{3} - C h = C H_{2} + H_{2}$	..........	..........
$C H_{3} - C H = C H - C H_{3} + H B r$	...........	........

Q. Match the column

A, B

C

Reactabts $(A)$	Products $(B)$	Name of the reaction $(C)$
$C H_{3} - C H_{3} + C l_{2}$	$C O_{2} + H_{2} O$	Addition reaction
$C_{2} H_{6} + O_{2}$	$C H_{2} = C H_{2}$	Thermal cracking
$_{n} C H_{2} = C H_{2}$	$C H_{2} = C H_{2} + C H_{4}$	Substitution reactions
$C H_{3} - C H_{2} - C H_{3}$	$C H_{3} - C H_{2} C l + H C l$	Polymerisation
$C H \equiv C H + H_{2}$	$[- C H_{2} - C H_{2} -]_{n}$	Combustion

Q. Explain the mechanism of the following reaction:

C H_{3} - C H_{2} - O H H^{+} - - \to 443 K C H_{2} = C H_{2} + H_{2}^{-} O

Q. Give the IUPAC name of the following compound:

C H_{3} - C H_{2} - C H_{3} | C H - C H_{2} - C H_{2} - C H_{2} - C H_{2} - C H_{2} - C H_{2} - C H_{2} - C H_{2} - C H_{3} | C H - C H_{3}

Q. Identify the type of the following reaction of carbon compounds.
a. CH₃ -CH₂ -CH₂-OH → CH₃ -CH₂ -COOH
b. CH₃ -CH₂ -CH₃ → 3CO₂ + 4H₂O
c. CH₃ -CH = CH -CH₃ + Br₂ → CH₃ -CHBr - CHBr -CH₃
d. CH₃ -CH₃ + Cl₂→ CH₃ -CH₂ -Cl + HCl
e. CH₃-CH₂ -CH₂ -CH₂ -OH → CH₃ -CH₂ -CH=CH₂ + H₂O
f. CH₃-CH₂ -COOH + NaOH → CH₃ -CH₂ -COO - Na⁺ + H₂O
g. CH₃ -COOH + CH₃ -OH → CH₃ -COO- CH₃ + H₂O

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