4 - Bromodecanoylbenzene ( 1 b ) : 1 H NMR ( CDCl 3 , 300 ㎒): δ . 7 . 84 - 7 . 81 ppm ( d , 2 H , J = 8 . 42 ㎐), 7 . 61 - 7 . 58 ppm ( d , 2 H , J = 8 . 37 ㎐), 2 . 95 - 2 . 90 ppm ( t , 2 H , J = 7 . 38 ㎐), 1 . 77 - 1 . 68 ppm ( m , 2 H ) , 1 . 28 ppm ( m , 12 H ) , 0 . 91 - 0 . 86 ppm ( t , 3 H , J = 6 . 55 ㎐)