66674-76-8Relevant academic research and scientific papers
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.
ORGANONICKEL CHEMISTRY. I. THE CRYSTAL AND MOLECULAR STRUCTURES OF Ph3PNi(Ph)(Ph2PCHCOPh) AND cis-Ni(Ph2PCHCOPh)2*0.5C7H8
Qichen, Huang,Minzhi, Xu,Yanlong, Qian,Weihua, Xu,Meicheng, Shao,Youqi, Tang
, p. 419 - 426 (2007/10/02)
Reaction of Ni(Cod)2, Ph3P and Ph3PCHCOPh in toluene affords Ph3PNi(Ph)(Ph2PCHCOPh) (I), but with Ph3As instead of Ph3P, it affords cis-Ni(Ph2PCHOPh)2*0.5tol (II).The crystal and molecular structures have been studied by X-ray diffraction.The crystals of I, are monoclinic, space group Cc, with a 13.549(7), b 13.775(3), c 19.763(6) Angstroem, β 102.34(3) deg, V 3603(2) Angstroem3, Z = 4.The final R factor is 0.070 for 1392 observed reflections.The crystals of II are monoclinic, space group C2/c, with a 27.425(7), b 11.113(2), c 24.534(7) Angstroem; β 108.27(2) deg, V 7100(3) Angstroem3, Z = 8.The final R factor is 0.083 for 1409 observed reflections.The coordinations of the nickel atoms in both structures are square planar, and the bond lengths and bond angles in the five-membered ring indicate a delocalized system.
