Abstract: The rates and regioselectivities of monohalogenation of C6H50R (1: a, R= C5Hll; b, R= C9H19; c, R= CI2H24 by chlorine water and bromine water to give 4-XC6H40R (2) and 2-XC6H40R (3)(X= C1, Br) have been determined in micellar sodium dodecyl sulfate (4) and vesicular sodium 3-[(2, 2-diheptadecyl-1, 3-dioxolan-4-yl) methoxy]-1-propanesulfonate (5) and dl-a-dipalmitoylphosphatidylcholine (6) in a pH 7.30 phosphate buffer. The 2/3 ...