SYNTHESIS AND CHARACTERIZATION OF ARYL(TRIFLUOROMETHYL)BISMUTH COMPOUNDS (R-C6H4)(3-N)BI(CF3)(N) [R=H, 4-CH3, 4-CF3, 3-F, 4-F N=1 AND 2] AND THE REACTIONS OF (C6H5)(3-N)BI(CF3)(N) [N=0-3] WITH BENZOYLPYRIDINIUM CHLORIDE

The partly new derivatives (R-C6H4)BiBr2 and (R-C6H4)(2)BiCl (R=4-CH3, 4-CF3, 3-F, 4-F) have been prepared from the redistribution reactions of the corresponding triarylbismuth compounds with BiBr3 and BiCl3, respectively. Metathesis reactions of these substrates with Cd(CF3)(2) complexes yielded the new aryl(trifluoromethyl)bismuth compounds (R-C6H4)(3-n)Bi(CF3)(n) (n=1 and 2). The mono(trifluoromethyl) derivatives are quite stable towards dismutations, whereas the bis(trifluoromethyl) compounds rapidly redistribute to give (R-C6H4)(2)Bi(CF3) and Bi(CF3)(3). Comparative reactions of (C6H5)(3-n)Bi(CF3)(n) with benzoylpyridinium chloride showed that the mixed derivatives preferentially transfer the phenyl group to yield benzophenone. Reactions of R(3)Bi with benzoylpyridinium chloride selectively give the corresponding phenone in good yield.