hz 6h 19 f nmr cdcl 3 u2212 137 16 dd j 1 24 6 hz j 2 8 1 hz 2f u2212 137 48 dd j 1 26 7 hz j 2 9 2 hz 1f u2212 138 49 dd j 1 24 3 hz j 2 8 3 hz 2f u2212 138 78 dd j 1 24 0 hz j 2 9 0 hz 1f u2212 154 07 t j 21 1 hz 3f u2212 162 0 u2212 162 9 m 6f 5 the pyridinium salt of the pd ii complex of 1 1 pd pyr u2212 pyrh a solution of 6 mg 7 5 u03bcmol of 5 10 15 tri 2 3 4 5 6 pentafluorophenyl cofrole 1 in 0 5 ml pyridine was treated with 1 9 mg 8 5 u03bcmol palladium ii acetate the mixture was heated to 100 u00b0 c for 3 h and then hexane was slowly added until crystallization began after filtration 6 5 mg of the pyridinium salt of the palladium complex was obtained 95 yield uv vis ch 2 cl 2 u03bb max nm 380 412 440 550 584 1 h nmr cdcl 3 8 69 d j 5 59 hz 2h 8 62 d j 4 12 hz 2h 8 32 d j 4 11 hz 2h 8 16 d j 4 34 hz 2h 8 11 d j 3 97 hz 2h 7 77 t j 7 47 hz 1h 7 33 t j 6 71 hz 2h 7 06 bs 1h 5 99 bs 2h 3 19 bs 2h 19 f nmr cdcl 3 u2212 136 6.