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Predict the major product, when -2methyl but -2 - ene is converted into an alcohol in each of the following methods. (i) Acid catalysed hydration (ii) Hydroboration (iii) Hydroxylation using bayers reagent |
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Answer» Solution :(i) Acid catalysed HYDRATION : `underset(("2-METHYL -but - 2- ENE"))(CH_3-underset(CH_3)underset(|)(C) = CH)-CH_3overset(H^(+)//H_2O)tounderset("(2-methyl-BUTAN - 2-ol)")(CH_3- underset(CH_3)underset(|)overset(OH)overset(|)C-CH_2-CH_3)` (ii) Hydroboration : `underset("2 - methyl -but - 2- ene")(6CH_3-underset(CH_3)underset(|)C=CH -CH_3) overset(H^(+)//H_2O)to2((CH_3)_2CH- overset(CH_3)overset(|)(CH)-)_3B` `((CH_3)_2CH-overset(CH_3)overset(|)CH-)_3B + 3H_2O_2 overset(OH^(Θ))tounderset("2 - methyl - butan - 2,3-diol")(3 CH_3 - underset(CH_3)underset(|)overset(OH)overset(|)C - overset(OH)overset(|)(CH) - CH_3)` `underset("(2 - methyl - but - 2ene)")(CH_3-underset(CH_3)underset(|)C=CH - CH_3)underset((O))overset(Cold KMnO_4//OH^(Θ))tounderset("(2- methyl - butan - 2,3-diol)")(3CH_3 -underset(CH_3)underset(|)overset(OH)overset(|)C - overset(OH)overset(|)CH - CH_3)` |
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