Arylaldoximedehydrodimers3a—1havebeenpreparedfromthecorrespondingoximes1a—1byusing(HCrO4)2(Py)4Coasoxidant.TheirstructureswereassignedtobebisnitronebyXPSstudies.ESRstudiesof3a—1inhotchloroformshowthatiminoxyradicals2a—1areformed.Thereforethedehydrodimerscanprovideaconvenientsourceoftheseradicals.