CH_3-C(CH_3)=CH_2 + (CH_3)_3CH xrightarrow[27 | vedclass

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(B) The reaction between isobutylene $(CH_3-C(CH_3)=CH_2)$ and isobutane $((CH_3)_3CH)$ in the presence of an acid catalyst like $HF$ at $273 \ K$ is

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$2, 2, 4$-trimethylpentane

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(B) The reaction between isobutylene $(CH_3-C(CH_3)=CH_2)$ and isobutane $((CH_3)_3CH)$ in the presence of an acid catalyst like $HF$ at $273 \ K$ is an alkylation reaction.This process is used in petroleum refining to produce high-octane gasoline.The major product formed is $2, 2, 4$-trimethylpentane,which is commonly known as isooctane.Mechanism:$1.$ Protonation of isobutylene: $(CH_3)_3C=CH_2 + H^{+} \rightarrow (CH_3)_3C^{+}$$2.$ Addition to another isobutylene molecule: $(CH_3)_3C^{+} + CH_2=C(CH_3)_2 \rightarrow (CH_3)_3C-CH_2-C^{+}(CH_3)_2$$3.$ Hydride transfer from isobutane: $(CH_3)_3C-CH_2-C^{+}(CH_3)_2 + (CH_3)_3CH \rightarrow (CH_3)_3C-CH_2-CH(CH_3)_2 + (CH_3)_3C^{+}$

$CH_3-C(CH_3)=CH_2 + (CH_3)_3CH \xrightarrow[273 \ K]{HF} C_8H_{18} (A)$
Unknown $(A)$ in the above reaction is:

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$CH_3-C(CH_3)=CH_2 + (CH_3)_3CH \xrightarrow[273 \ K]{HF} C_8H_{18} (A)$ Unknown $(A)$ in the above reaction is: