Two isomers (A) and (B) with molar mass 184 | vedclass

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(C) $1$. Empirical formula calculation: Moles of $C = 52.2/12 = 4.35$,$H = 4.9/1 = 4.9$,$Br = 42.9/80 = 0.536$. Ratio: $C:H:Br = 8:9:1$. Empirical for

Vedclass · Accepted Answer

$H_3C-CHBr-C_6H_5$ and $p$-bromobenzyl bromide

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(C) $1$. Empirical formula calculation: Moles of $C = 52.2/12 = 4.35$,$H = 4.9/1 = 4.9$,$Br = 42.9/80 = 0.536$. Ratio: $C:H:Br = 8:9:1$. Empirical formula is $C_8H_9Br$. Molar mass is $184 \ g/mol$,which matches $C_8H_9Br$. $2$. Oxidation with $KMnO_4$: Isomer $(A)$ gives benzoic acid,implying it has an alkyl group attached to the benzene ring at the alpha position (e.g.,$C_6H_5-CH(Br)-CH_3$). Isomer $(B)$ gives $p$-bromobenzoic acid,implying it has an ethyl group at the para position relative to the bromine atom (e.g.,$p-Br-C_6H_4-CH_2CH_3$). $3$. Isomer $(A)$ is optically active: $C_6H_5-CH(Br)-CH_3$ has a chiral center. $4$. Isomer $(A)$ gives a precipitate with $AgNO_3$: The benzylic bromide is reactive. $5$. Therefore,$(A)$ is $1$-bromo-ethylbenzene $(H_3C-CHBr-C_6H_5)$ and $(B)$ is $1$-bromo$-4-$ethylbenzene ($p$-ethylbromobenzene).

Column-$I$	Column-$II$
$(i)$ $R-Cl + NaI \xrightarrow{\text{dry acetone}} R-I + NaCl$	$(a)$ Swarts reaction
$(ii)$ $CH_3-Br + AgF \xrightarrow{\Delta} CH_3-F + AgBr$	$(b)$ Wurtz reaction
$(iii)$ $R-X + Mg$ $\xrightarrow{\text{dry ether}} R-Mg-X$ $\xrightarrow{H_2O} RH + Mg(OH)X$	$(c)$ Finkelstein reaction
	$(d)$ Grignard reaction

Similar Questions

Which of the following reactants is used to obtain the compound $(A)$ shown below? (Assume that $EtO^{-}$ is used in all the reactions)

In the following reaction sequence,$[ C ]$ is :

Arrange the following compounds in decreasing order of reactivity for nucleophilic substitution reaction:
$(I)$ $CH_3-CH_2-OSO_2CF_3$
$(II)$ $CH_3-CH_2-OTs$
$(III)$ $CH_3-CH(OH)-CH_3$
$(IV)$ $C_6H_5-CH(OH)-CH_3$

Which of the following molecules would have a carbon-halogen bond most susceptible to nucleophilic substitution?

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