Chemistry - ALCOHOL & ETHER Question with Solution | TestHub

Structure of butan-2-ol is

$\mathrm{C}{\mathrm{H}}_3-\underset{\mathrm{O}\mathrm{H}}{\underset{|}{\mathrm{C}}\mathrm{H}}-\mathrm{C}{\mathrm{H}}_2-\mathrm{C}{\mathrm{H}}_3$

Now, the simple format of HBO (hydroboration oxidant) reaction is

$\text{R}-\text{CH}={\text{CH}}_2+{\text{B}}_2{\text{H}}_6\stackrel{\text{THF}}{\to }{(\text{R}-{\text{CH}}_2{\text{CH}}_2)}_3\text{B}\stackrel{{\text{H}}_2{\text{O}}_2/\stackrel{-}{\text{O}}\text{H}}{\to }{\text{RCH}}_2\underset{\stackrel{|}{{\displaystyle \text{OH}}}}{{\text{CH}}_2}$

So,$\mathrm{C}{\mathrm{H}}_3-\mathrm{C}\mathrm{H}=\mathrm{C}\mathrm{H}-\mathrm{C}{\mathrm{H}}_3$definitely an option as the mechanistic approach for the$\mathrm{B}{\mathrm{H}}_3$addition is as



${({\text{CH}}_3{\text{CH}}_2-{\text{CHCH}}_3)}_3\text{B}\stackrel{{\text{H}}_2{\text{O}}_2/\stackrel{-}{\text{O}}\text{H}}{\to }{\text{CH}}_3{\text{CH}}_2-\underset{\text{OH}}{\underset{|}{\text{C}}\text{H}}{\text{CH}}_3$

Now,$\mathrm{C}{\mathrm{H}}_3-\mathrm{C}\mathrm{H}=\mathrm{C}\mathrm{H}-\mathrm{C}{\mathrm{H}}_3$can have both cis and trans-forms.