2,4,6-TRIS(TRIFLUOROMETHYL)PHENYL AND 2,4,6-TRIS(TRIFLUOROMETHYL)DITHIOBENZOATE AS LIGANDS IN COBALT(II) AND NICKEL(II) COMPOUNDS

(R(F))2Co (1) and (RF)2Ni (2) have been prepared by reacting anhydrous CoCl2 and NiCl2 with two equivalents of R(F)Li (R(F) = 2,4,6-tris(trifluoromethyl)phenyl). The compounds 1 and 2 are the first homoleptic transition metal derivatives containing sigma-bonded RF ligands. The previously unknown 2,4,6-tris(trifluoromethyl)dithio-benzoic acid, RFCSSH (3), and its piperidinium salt, [C5H5NH2] [RFCS2] (4), have been synthesized and fully characterized. 3 reacts with CoCl2 and NiCl2 in diethylether/THF to give [R(F)-CS2]2Co(THF) (5) and [RFCS2]2Ni(THF) (6), respectively.