Okeya, Seichi, Kawakita, Yasuo, Matsumoto, Shinichi, Nakamura, Yukio, Kawaguchi, Shinichi, Kanehisa, Nobuko, Miki, Kunio, and Kasai, Nobutami
Reactions of bis(trifluoroacetylacetonato)palladium(II), [Pd(tfac)2], with tertiary phosphines followed by pyridine or its derivatives afforded a series of the [Pd(tfac(2–)-C,O)LL']-type complexes which contain a C,O-chelating trifluoroacetylacetonate dianion and a couple of tertiary phosphine and/or heterocyclic nitrogen base ligands (L and L'). Their structures in solution were studied by 1H, 13C, 19F, and 31P NMR spectroscopy and the molecular structure in a crystal of [Pd(tfac(2–)-C,O)(PPh3)(2,6-Me2-py)]·C6H6containing triphenylphosphine and 2,6-dimethylpyridine as L and L' was determined by means of X-ray diffraction.