Reactions de complexes du nickel avec l'acetylene pour aboutir a des complexes de types (R 3 P) 2 Ni(C 2 H 2 ), [(RO) 3 P] 2 , Ni(C 2 H 2 ), (t-BuNC) 2 Ni(C 2 H 2 ), [(R 3 P)Ni(C 2 H 2 )(C 2 H 4 )], [(R 3 P)Ni(C 2 H 4 ) 2 (μ-C 2 H 2 )] et (R 3 P)Ni(C 2 H 2 ) 2
Reactions de complexes du Nickel avec l'乙炔浇注关于一种 des complexes de type (R 3 P) 2 Ni(C 2 H 2 ), [(RO) 3 P] 2 , Ni(C 2 H 2 ), (t- BuNC) 2 Ni(C 2 H 2 ), [(R 3 P)Ni(C 2 H 2 )(C 2 H 4 )], [(R 3 P)Ni(C 2 H 4 ) 2 (μ-C 2 H 2 )] et (R 3 P)Ni(C 2 H 2 ) 2
Butadiene and methyl substituted 1,3-dienes react with zerovalent-nickel-ligand complexes in a stoichiometric manner to give octadienediylnickel-ligand complexes. The structure, rearrangement and reactions with CO and P-donor ligands of these species have been studied with the help of 1H and 13C NMR spectroscopy. The results provide an insight into the mechanism of the nickel-catalysed cyclodimerization
丁二烯和甲基取代的1,3-二烯以化学计量的方式与零价镍-配体络合物反应,生成辛二烯二基镍-配体络合物。借助1 H和13 C NMR光谱研究了这些物种的结构,重排以及与CO和P供体配体的反应。该结果提供了对镍催化的1,3-二烯环二聚反应机理的见解。
tmeda-Nickel-Komplexe
作者:Wolfgang Schröder、Klaus R. Pörschke
DOI:10.1016/s0022-328x(00)99366-5
日期:1987.4
Above −40°C, 3a,b decompose in solution, which coupling of the butadiene ligands to afford Ni(η3,η3,η2-C12H18), which was shown to be an intermediate of the nickel-catalyzed cyclotrimerisation reaction of butadiene. Thus 3a,b are the first butadienecomplexes of nickel that are catalytically active despite the presence of stabilizing ligands.