What is meant by hydroboration -oxidation reaction . Illustrate with an example .

Explanation

Hydroboration oxidation : Diborane adds fo alkenes to give trialkyl borane. It further gives alcohol. The reaction has been shown for propene as an oxidation.
`H_3C-CH=CH_2+(BH_3)_2 rarr CH_3-CH_2-CH_2-BH_2 overset(H_3C-CH-CH_2)to (CH_3-CH_2-CH_2)_2BH overset(CH_3-CH=CH_2)to (CH_3-CH_2-CH_2)_3 B overset(H_2O_2//OH^(-))to underset("Propan-1-ol")(3CH_3CH_2CH_2OH)+underset("Boric acid")(B(OH)_3)`
It follows anti-Markownikov.s rule.