Described are compounds of the formula: ##SPC1## Wherein: X = cl, Br, I, CH.sub.3 ; Y = h, cl, Br, I, F, CH.sub.3 ; n = 1 or 2, Z = alkyl having from 1 to 5 carbon atoms, and When n is 2 only one of X and Y may be CH.sub.3 . These compounds are useful as selective herbicides.