4-trifluoromethyl-4'-nitrodiphenyl ethers

Abstract From the Canadian patent

i -, Abstract of the Disclosure, Compounds of the formula: wherein X is hydrogen, halo, trihalomethyl alkyl, nitro or cyano; X1 is hydrogen, halo or trihalomethyl;, R1 and R2 are hydrogen alkyl phenyl or benzyl; n is, 1 to 5, and Z is halo cyano, nitro, trihalomethyl, methylthio methylsulfinyl, methylsulfonyl, acetyl phenyl, or a heterocycle of from 4 to 6 nuclear atoms containing from 1 to 4 heteroatoms selected from nitrogen oxygen and sulfur, and compositions containing these compounds, exhibit herbicidal activity.