Bivalent Nickel, Platinum, and Palladium

Bivalent Nickel, Platinum, and Palladium.—Crystal structures of NEt CPtCls 

Letters, 1977, 877. 

PdCHa(CH2)2CH2 treatment with Ph3CBp4 yields [(diphos)Pd(i -l-methyl-allyl)]BF4.  

Reaction of bis( -methylallyl)Ni with COa in the presence of PCy 3 yields (15), resulting from COa insertion into an allyl-Ni a-bond formed under the influence of phosphine. Similarly, (16a), prepared from isoprene and Ni(PCy3)3, reacts with CO2 to yield the dimer (17), whereas (16b), prepared using butadiene, reacts 

Although reaction of (PhCN)2PdCl2 with acetylacetone at 0 °C yields [PdCl-(acac-D,O0]2 this is converted into the novel -allyl (20) on prolonged reaction at room temperature. Bridge splitting may be achieved with PPhs or AsPhg (L) 

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