In the ethene/CO copolymerization catalyzed by palladium derivatives, species arising from ethene insertion into the palladium−acyl bond have been shown to play a key role. We report here the synthesis, spectroscopic characterization, and X-ray structure of the complex (HL = 6-Me-2,2‘-bipyridine, Ar‘ = 3,5-(CF 3 ) 2 C 6 H 3 ), 4, the first one having an ancillary N,N ligand to be characterized in the solid state.
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Stoccoro et al. (2001) studied this question.