Difluoroalkane and difluoroalkenylalkane pesticides

A difluoroalkane or difluoroalkenylalkane derivative of the structural formula I ##STR26## in which R is a 1,1-difluoroalkyl group of 1 to 3 carbon atoms or a 1,1-difluoroalkenyl group of 2 to 4 carbon atoms, optionally carrying a halogen substituent selected from bromine and chlorine, m is an integer which produces a carbon chain length for the group R(CH.sub.2).sub.m which is an even number in the range of 2 to 20, Y is --NR.sup.1 --, or --O--, R.sup.1 is hydrogen or lower alkyl, and R.sup.2 is:

• (a) hydrogen, an alkali metal, or ammonium,
• (b) alkyl of 1 to 12 carbon atoms,
• (c) lower alkyl substituted with halogen, trifluoromethyl, ethenyl, difluoroethenyl ethynyl, lower alkoxy, C.sub.3 -C.sub.6 cycloalkyl which may be fluoro-substituted, lower alkylcarbonyl, lower alkoxycarbonyl, hydroxycarbonyl, cyano, phenylmethylfuryl, phenoxy, halophenoxy, phenyl, halophenyl, C.sub.1 -C.sub.2 alkoxyphenyl, thienyl, halothienyl, or a cyclopropyl group and a phenyl group which may be substituted with a substituent selected from halogen, methyl, trifluoromethyl and trifluoromethoxy, or a methyl group substituted with phenylmethyl and hydroxycarbonyl,
• (d) phenyl which may be substituted with one to three substituents independently selected from lower alkyl, halogen, lower alkoxy, formyl, nitro, hydroxycarbonylethenyl, lower alkoxycarbonylethenyl, and lower alkylamino(lower)alkoxycarbonyl,
• (e) pyridyl which may be substituted with halogen,
• (f) a group of the formula --SO.sub.2 R.sup.3 in which R.sup.3 is phenyl or phenylmethyl in which the ring may be substituted with a substituent selected from the group consisting of lower alkyl, halogen, and lower alkoxy, thienyl, pyridyl, or lower alkyl,
• (g) a group of the formula --N.dbd.CR.sup.4 R.sup.5 in which R.sup.4 is amino or dimethylamino and R.sup.5 is phenyl or phenylmethyl optionally ring substituted with lower alkoxy or trifluoromethoxy, or thienyl,
• (h) a group of the formula --C(SR.sup.6).dbd.NR.sup.7 in which R.sup.6 is lower alkyl or F.sub.2 C.dbd.CFC.sub.2 H.sub.4 and R.sup.7 is lower alkylcarbonyl or phenyl which may be substituted with a halogen atom,
• (i) a group of the formula --NR.sup.8 R.sup.9 in which R.sup.8 is hydrogen or lower alkyl, R.sup.9 is hydrogen, lower alkyl, alkylaminocarbonyl, phenylcarbonyl, F.sub.2 C.dbd.CHC.sub.3 H.sub.6 C(O)-- or acetyl,
• (j) a substituent selected from fluoroethoxy, F.sub.2 ClCCH.dbd.CHC.sub.9 H.sub.18 --, F.sub.2 C.dbd.CHC.sub.10 H.sub.20 --, 2,2-dimethyl-2,3-dihydrobenzofuranyl, 2,2-dimethyl-2,3-dihydrobenzofuranyloxycarbonyl, dimethoxyindanyl, and ##STR27## or Y and R.sup.2 taken together are hydrogen or form a nitrogen containing group selected from (lower)alkenylamino, piperidyl, pyrrolidinyl, or thiomorpholinyl.