Question 1

Write the equations involved in the following reaction.Williamson ether synthesis.

Accepted Answer

Williamson ether synthesis is used for the preparation of simple as well as mixed ethers.Alkyl halide reacts with alcoholic sodium or potassium alkoxide to form ether. R-O-Na + R'-X \xrightarrow {\Delta} R-O-R'+NaX For example, sodium methoxide reacts with methyl iodide to form dimethyl ether. CH_3-O-Na +CH_3-I \xrightarrow {\Delta} CH_3-O-CH_3+NaI

Question 2

Write IUPAC name of the given compound:

Accepted Answer

The IUPAC names are as shown.As here  R-OH  is functional group so parent chain contain carbon having  -OH  that carbon should get lowest numbering. Hence the numbering should start from right-hand side as from right side substituents get lowest numbering.

Question 3

Give the structures and IUPAC names of monohydric phenols of molecular formula,  C_7H_8O .

Accepted Answer

The structures and IUPAC names of monohydric phenols of molecular formula,  C_7H_8O  are shown above.

Question 4

How does ethyl alcohol react with the following? Write equations.(i) Metallic  Na (ii)  CH_{3}COOH (iii)  CH_{3}MgI (iv)  Conc. H_{2}SO_{4}  at  170^{\circ}C

Accepted Answer

(i) Metallic Na:Ethyl alcohol react with metallic Na to form sodium ethoxide and hydrogen gas. \displaystyle C_2H_5-OH  + Na \rightarrow C_2H_5-ONa + \dfrac {1}{2}H_2 \uparrow  (ii)  \displaystyle CH_3COOH :Ethyl alcohol react with acetic acid to form ethyl acetate. \displaystyle C_2H_5-OH +CH_3COOH \underset {\displaystyle  H^+}{\rightleftharpoons} CH_3-\underset {\displaystyle \underset {\displaystyle O }{ || } }{C} O-C_2H_5 +H_2O (iii)  \displaystyle CH_3MgI :Ethyl alcohol react with methyl magnesium iodide (grignard reagent) to form methane \displaystyle C_2H_5-OH + CH_3MgI  \rightarrow CH_4+C_2H_5-OMgI (iv) Conc.  \displaystyle H_2SO_4  at 170 \displaystyle ^o C:Ethyl alcohol react with conc.  \displaystyle H_2SO_4  at 170 \displaystyle ^o C to form ethylene via dehydration  \displaystyle C_2H_5-OH  \xrightarrow  [170 ^oC]{95\% H_2SO_4} CH_2=CH_2

Question 5

Give equations of the following reactions:
(i) Oxidation of propan-1-ol with alkaline

K M n O_{4}

solution.
(ii) Bromine in

C S_{2}

with phenol.
(iii) Dilute

H N O_{3}

with phenol.
(iv) Treating phenol wih chloroform in presence of aqueous

N a O H

.

Accepted Answer

The chemical reactions are given above:

Alcohols, Phenols And Ethers