Certain substituted bis(2-benzoyl-3-oxo-cyclohexenyl) thioglycols

An herbicide compound of the formula wherein R is halogen, C1-C2 alkyl, C1-C2 alkoxy, nitro; cyano; C1-C2 haloalkyl, or RaSOn- wherein n is 0 or 2 and Ra is C1-C2 alkyl; R1 is hydrogen or C1-C4 alkyl; R2 is hydrogen or C1-C4 alkyl; or R1 and R2 together are alkylene having 2 to 5 carbon atoms; R3 is hydrogen or C1-C4 alkyl; R4 is hydrogen or C1-C4 alkyl; or R3 and R4 together are oxo; R5 is hydrogen or C1-C4 alkyl; R6 is hydrogen or C1-C4 alkyl; or R5 and R6 together are alkylene having 2 to 5 carbon atoms; R7 and R8 independently are (1) hydrogen; (2) halogen; (3) C1-C4 alkyl; (4) C1-C4 alkoxy; (5) trifluoromethoxy; (6) cyano; (7) nitro; (8) C1-C4 haloalkyl; (9) RbSOn-wherein n is the integer 0, 1 or 2; and Rb is (a) C1-C4 alkyl; (b) C1-C4 alkyl substituted with halogen or cyano; (c) phenyl; or (d) benzyl; (10) -NRcRd wherein Rc and Rd independently are hydrogen or C1-C4 alkyl; (11) ReC(O)- wherein Reis C1-C4 alkyl or C1-C4 alkoxy; (12) SO2NRcRd wherein Rc and Rd are as defined; (13) -N(Rc)C(O)Rd wherein Rcand Rd are as defined; or (14) -CH2CH2OCH3 or -CH2CH2OC2H5; with the proviso that R7 is not at the 6-position; and R9 is C2-C6 alkylene.