(CH3)2CHCH=CH2 3-methyl-1-butene, HCl. Br2. i) Hg(OAc)2 ii) NaBH4. i) BH3 ii) H2O2 & base. HOBr. KMnO4. (CH3)2C=CHCH3 2-methyl-2-butene, HCl. Br2.
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