Reactivity order of bromination = 3° : 2° : 1° = 1600 : 82 : 1
(A) is obtained from the reaction of none equivalent 1° H atoms.
(B) is obtained from the reaction of one 3° H atoms
Percentage of (A) (isobutyl bromide) 9 x 100/1609 = 0.56%
Percentage of (B) (tert-butyl bromide) = 1600 x 100/1609 = 99.4%
Ratio = 177.7:1
Formation of t-Butyl bromide is 177.7 times to that of Isobutyl bromide.
Relative amount 9 x 1
1600 x 1 = 1600.0
Total = 1609.0
