Predict the percentage of ismoers formed during monobromination of 2,3-dimethyl butane at room temperature. Relative reactivity of `1^(@)` , `2^(@)` , `3^(@)` H atoms to chlorination is `(1.0 : 3.8 : 5.0)` .

Explanation

(A) is obtained from the reaction of 12 equivalent `1^(@)` H atoms. `12xx1 =12.0`
(B) is obtained from the reaction of two equivalent `3^(@)` H atoms. `2xx5 =10.0`
Total `=22.0`
Percentage of (A) `=(12xx100)/(22) =54.5%`
Percentage of (B) `=(10xx100)/(22) =45.5%`