As part of an ongoing program on the chemistry and biological activity of N-oxide-containing molecules, a number of novel 1, 2, 5-oxadiazole N-oxide, benzo [1, 2-c] 1, 2, 5-oxadiazole N- oxide, and quinoxaline N, N'-dioxide derivatives were synthesized and evaluated for their herbicidal activity. Many of these compounds exhibited moderate to good herbicidal pre- emergence activity against Triticum aestivum. Dose-response studies were done on the ...