Non-arylic DiorganothalIium Derivatives obtained by Metallation. Synthesis and Isolation of the First DiketonyIthalIium (III) Complexes

Abstract

Addition of trifluoroacetic or trifluoromethanesulfonic acid to solutions of thaIlium(l1l) trifluoroacetate in acetone results in formation of the compounds [TI{CH,C(O)Me},X] (X = CF,CO, l a or CF,SO, 1 b. Compound 1 b reacts in a 1 : 1 ratio with LiCl or KBr giving the halogeno derivatives [TI{CH,C(O)Me},Y] (Y = CI 2a or Br 2b). Compound 2a reacts with [N(PPh,),]CI yielding the anionic complex “(PPh,),] [TI{CH,C(O)Me},CI,] 3. The reaction of 1 b with 2,2‘-bipyridine (bipy) gives [{TI[CH,- C(O)Me],(p-CF,SO,) (bipy)},] 4 in which each thallium atom has a distorted six-co-ordination with the acetonyl ligands in trans positions and two cis positions occupied by two bridging triflate anions.