3,5-DICHLOROTRIFLUOROPHENYL COMPLEXES, ARYL DERIVATIVES WITH SIMPLE F-19 NMR STRUCTURAL PROBES - THE SYNTHESIS OF GENERAL PRECURSORS FOR PD-COMPLEXES AND PT-COMPLEXES

High yield methods for the synthesis of cis-[MR2(COD)] (M=Pd, Pt; R=3, 5-C6Cl2F3), cis-[MR2(THF)(2)] (M=Pd; Pt), trans-[PdR2L2] (L = tht; SMe 2), trans-[PtR2(SMe2)(2)], and [M-2(mu-Cl)(2)R2L2] (M = Pd, L = NCPh, tht, SMe2; M = Pt, L = tht) are reported. These complexes are general precursors for the preparation of other complexes containing cis-MR2, trans-MR2 and MClR moieties in almost quantitative yields. Thus, by di splacement of COD, THF, tht or SMe2 by other ligands, almost any isome r of any complex with one or two aryl rings can be prepared. The F-19 NMR spectra of these complexes are simple compared to those of other p olyfluorophenyl groups, and some examples of the spectral advantages o f this partially fluorinated ligand are given. (C) 1998 Elsevier Scien ce S.A.