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  • Match the items of Column I and Column II.

Match the items of Column I and Column II.

column I Column II
i. S_N1 reaction a. vic-dibromides
ii. Chemicals in fire extinguisher  b. gem - dihalides
iii. Bromination of alkene c. Racemination 
iv. Alkylidene halides d. Saytzeff rule
v. Elimination of HX from alkylhalide e. Chlorobromocarbons

 

Answers (1)

(i \rightarrow c), (ii \rightarrow e), (iii \rightarrow a), (iv \rightarrow b), (v \rightarrow d)

(i) When any mixture has two enantiomers in equal proportions, then there will be zero optical rotation observed. These kinds of mixtures are called racemic mixtures and this process of conversion of enantiomers into a racemic mixture is known as racemisation. When alkyl halide follows SN1 mechanism then racemisation is observed.

(ii) Chlorofluorocarbons are used in fire extinguishers.

(iii) Halogen atoms are present on the adjacent carbon atom in vic-dihalides. vic-dihalides are observed from the Bromination of alkanes.

(iv) Alkylidene halides are also known as gem-dihalides. Halogen atoms are present on the same carbon atom in case of gem-dihalides.

(v) Elimination of HX from alkylhalide follows Saytzeff rule. This rule states that “in dehydrohalogenation reactions, the preferred product is that alkene which has the greater number of alkyl groups attached to the doubly bonded carbon atoms”.

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