4 - Bromodecylbenzene ( 2 b ) : 1 H NMR ( CDCl 3 , 300 ㎒): δ . 7 . 43 - 7 . 40 ppm ( d , 2 H , J = 8 . 18 ㎐), 7 . 09 - 7 . 06 ppm ( d , 2 H , J = 8 . 21 ㎐), 2 . 61 - 2 . 56 ppm ( t , 2 H , J = 6 . 8 ㎐), 1 . 64 - 1 . 58 ppm ( m , 2 H ) , 1 . 3 ppm ( m , 21 H ) , 0 . 94 - 0 . 90 ppm ( t , 3 H , J = 6 . 57 ㎐)