The major products 'A' and 'B',respectively,a | vedclass

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(A) The reaction of $2$-methylpropene with cold $H_2SO_4$ follows Markovnikov's addition,where the proton $H^+$ adds to the terminal carbon to form a

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$H_3C-C(CH_3)_2-OSO_3H$ & $CH_3-C(CH_3)=CH-C(CH_3)_3$

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(A) The reaction of $2$-methylpropene with cold $H_2SO_4$ follows Markovnikov's addition,where the proton $H^+$ adds to the terminal carbon to form a stable tertiary carbocation $(CH_3)_3C^+$. This carbocation then reacts with the hydrogen sulfate ion $HSO_4^-$ to form the alkyl hydrogen sulfate,$2$-methyl$-2-$propyl hydrogen sulfate,which is product '$A$'.At higher temperatures $(80^{\circ}C)$,the reaction involves the dimerization of the alkene. The tertiary carbocation $(CH_3)_3C^+$ formed initially attacks another molecule of $2$-methylpropene to form a more stable carbocation,which then undergoes deprotonation to yield the dimer,$2,4,4$-trimethylpent-$2$-ene,which is product '$B$'.

The major products '$A$' and '$B$',respectively,are

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