Palladium(II)–acetylacetonate complexes containing phosphine and diphosphine ligands and their catalytic activities in telomerization of 1,3-dienes with diethylamine

• A series of novel palladium acetylacetonate complexes were prepared.
• Complexes were characterized by XRD analysis, NMR and FTIR.
• Models of the structure and IR wavenumbers assignments were obtained by DFT.
• Complexes were tested in the telomerization of isoprene and butadiene.
• In the case of telomerization of butadiene high catalyst activity was obtained.

A series of novel [Pd(acac-O,O′)(PˆP)]BF4 and known complexes [Pd(acac-O,O′)(PR3)2]BF4 (PˆP = dppm (1), dppp (2), dppb (3), dppf (4); R = Ph (5), p-Tol (6), i-Pr (7); acac = 2,4-pentanedionato) were prepared by the reaction of [Pd(acac-O,O′)(MeCN)2]BF4 (1) with appropriate ligands. Complex 2 was characterized by single-crystal X-ray analysis. Models of the structure and IR wavenumbers assignments of the cations of 1–4 were obtained by DFT calculations. Synthesized complexes were tested as catalysts in the telomerization of isoprene and butadiene with diethylamine. In the case of telomerization of butadiene with diethylamine high catalyst activity (e.g. TOFav = 1940 h−1 and TON up to 17,480 for complex 5) was obtained.

A series of novel [Pd(acac-O,O′)(PˆP)]BF4 and known complexes [Pd(acac-O,O′)(PR3)2]BF4 (PˆP = dppm, dppp, dppb, dppf; R = Ph, p-Tol, i-Pr) were prepared by the reaction of [Pd(acac-O,O′)(MeCN)2]BF4 with appropriate ligands. Synthesized complexes were tested as catalysts in the telomerization of isoprene and butadiene with diethylamine.Figure optionsDownload as PowerPoint slide