Abstract
The dimeric η 1-ylide palladium complex, [{PhMe 2P +CH(SiMe 3)}Cl 2Pd −] 2 (I), prepared in 94% yield from (PhCN) 2PdCl 2 and PhMe 2PCHSiMe 3, is converted to a new η 1-ylide cyclic diolefin complex; [{PhMe 2P +CH(SiMe3)}Cl(diolefin)Pd]-(PF 6) − (IIa, IIb), by the abstraction of the chloride anion of I with silver hexafluorophosphate in the presence of 1,5-cyclooctadiene or norbornadiene. Complexes IIa and IIb have a neutral palladium(II) moiety and are regarded as palladium(II)-substituted phosphonium salts.
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