Intermediates in the Palladium-Catalysed Reactions of 1,3-Dienes, Part 5 [1] Butadiene Complexes of Nickel, Palladium and Platinum
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چکیده
A series of [M (R2PC2H4PR:)(butadiene)] com plexes of Ni, Pd and Pt has been prepared and their structures investigated NMR-spectroscopically. The nickel and palladium com plexes, irre spective of the substituents at phosphorus, contain a fluxional ?/2-bonded butadiene m olecule. In the case of platinum the bonding mode is ligand dependent: an ^-arrangem ent is observed where R is tert-butyl or cyclohexyl while when R is isopropyl the butadiene adopts an rj', ̂ '-arrangement to give a platinacyclopentene derivative.
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