A) indefinite
B) \[{{H}^{+}}+B{{r}^{-}}\]both at one time
C) \[{{H}^{+}}\]
D) \[B{{r}^{-}}\]
Correct Answer: C
Solution :
Key Idea: Alkene undergo electrophilic addition reaction. Electrophile is electron deficient species. During electrophilic addition electrophile first adds across \[C=C\]or \[C=C.\] (i) \[C{{\overset{+}{\mathop{H}}\,}_{2}}-CH_{2}^{-}+{{H}^{+}}+B{{r}^{-}}\] (ii) \[CH_{2}^{+}-CH_{2}^{-}+{{H}^{+}}\xrightarrow{{}}CH_{2}^{+}-C{{H}_{3}}\] (iii) \[CH_{2}^{+}-C{{H}_{3}}+B{{r}^{-}}\xrightarrow{{}}C{{H}_{2}}Br-C{{H}_{3}}\] \[\therefore \]Initial addition occur by \[{{H}^{+}}.\]You need to login to perform this action.
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