66674-76-8Relevant articles and documents
Reactions of chelafe ylides with nickel(0) complexes
Keim, Wilhelm,Behr, Arno,Gruber, Bert,Hoffmann, Bernd,Kowaldt, Frank H.,Kürschner, Ulf,Limb?cker, Brigitte,Sistig, Frank P.
, p. 2356 - 2359 (2008/10/08)
Nickel(0) complexes react with α-keto ylides of phosphorus and arsenic, Ph3A=BC(O)R (A = P, As; B = CH, CR′, N), yielding a variety of new nickel complexes. In this novel reaction an unusual phenyl group migration is observed. Depending on the nature of the nickel(0) complexes applied, the phenyl group migrates to the nickel, thus forming a nickel-phenyl bond, or the phenyl group migrates to the hydrocarbon ligand, thus forming the corresponding C-C-linked hydrocarbon product. The nickel-phenyl bond proved to be quite reactive toward insertion of molecules such as carbon monoxide, carbon dioxide, ethene, and tolan. When carbon monoxide and tolan were used, the corresponding nickel complexes could be isolated. Interestingly, the isolated complexes are active catalyst precursors for the oligomerization of ethene to give highly linear α-olefins.
