Q56 of 97 Page 142

Write the structures and names of the compounds formed when compound ‘A’ with molecular formula, C7H8 is treated with Cl2 in the presence of FeCl3.

When an arene is treated with Cl2 in presence of FeCl3, it undergoes chlorination to give aryl chloride by electrophilic addition reaction. Thus the compound given is C6H5—CH3, or toluene. On chlorination by electrophilic substitution, the products are o-chlorotoluene and p-chlorotoluene.


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54

Classify the following compounds as primary, secondary and tertiary halides.

(i) 1-Bromobut-2-ene


(ii) 4-Bromopent-2-ene


(iii) 2-Bromo-2-methylpropane


 55

Compound ‘A’ with molecular formula C4H9Br is treated with aq. KOH solution. The rate of this reaction depends upon the concentration of the compound ‘A’ only. When another optically active isomer ‘B’ of this compound was treated with aq. KOH solution, the rate of reaction was found to be dependent on concentration of compound and KOH both.

(i) Write down the structural formula of both compounds ‘A’ and ‘B’.


(ii) Out of these two compounds, which one will be converted to the product with inverted configuration?


 57

Identify the products A and B formed in the following reaction:

(a) CH3—CH2—CH=CH—CH3+HCl → A + B


 58

Which of the following compounds will have the highest melting point and why?

(I)



(II)



(III)