The present invention is directed to herbicidal compounds of the formula ##STR1## wherein each R.sup.1 independently is halogen; R.sub.2 is halo or trifluoromethyl; and n is 1-5; with the provisos that when n is 1, R.sup.1 is other than fluorine, and when n is 2 and each R.sup.1 is chlorine, at least one R.sup.1 is located at a para or ortho position on the phenyl ring.