Synthesis, characterization, and application for addition polymerization of norbornene of novel acetylacetonate bis(anilines) palladium (II) complexes

• New acetylacetonate bis(aniline) palladium (II) complexes were synthesized.
• XRD/DFT studies show hydrogen bonding between the aniline ligands and [BF4]−.
• Complexes are active (> 106 gPNB molPd− 1 h− 1) in the polymerization of norbornene.

New acetylacetonate bis(aniline) palladium (II) complexes were synthesized by nitrile substitution of [Pd(acac)(MeCN)2]BF4 with L (L = o-toluidine, p-toluidine, 2,6-dimethylaniline, 2,6-diisopropylaniline) which yielded [Pd(acac)(L)2]BF4 as a mononuclear species with chelating acac ligand. Preliminary investigations into the polymerization of norbornene in the presence of BF3·OEt2 were performed. An X-ray diffraction study of [Pd(acac){NH2(2,6-Me2C6H3)}2]BF4 establishes the presence of hydrogen bonding between the 2,6-dimethylaniline ligand and [BF4]− anion.

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