Oxidative addition of alkanenitriles to nickel(0) complexes via π-intermediates
作者:Giancarlo Favero、Antonino Morvillo、Aldo Turco
DOI:10.1016/s0022-328x(00)98512-7
日期:1983.1
the complexes [Ni(PCy3)2] or [Ni(PCy3)2}2N2]. Both the end-on [Ni(PCy3)2(σ-R′CN)] and the edge-on [Ni(PCy34)(π-R′CN)] adducts are formed,and are present in an equilibrium the position of which is governed by the amount of added PCy3. The π-complexes react to give the cyano-organometal complexes [Ni(PCy3)n(R′)(CN)] through an oxidativeaddition involving splitting of the CCN bond. The complexes obtained
Carbonylation of cyano(phenyl)bisligand-nickel(II) complexes and related reactions of benzoyl cyanide with nickel(0) complexes
作者:G. Favero
DOI:10.1016/s0022-328x(00)90519-9
日期:1980.12
Carbonylation of the complexes Ni(CN)(C6H5)(P)2 (P = P(C2H5)3; P(cyclo-C6H11)3; 12(C2H5)2P(CH2)4P(C2H5)2) affords the acyl-derivatives Ni(CN)(COC6H5)(P)n (n = 1, 2) which, in the presence of excess CO, undergo reductive elimination of C6H5COCN. It has been shown that C6H5COCN reacts with the NiPn (n = 2, 4) complexes to give molecular adducts in which the organic reagent is coordinated to the nickel atom through
配合物的羰基化Ni(CN)(C 6 H 5)(P)2(P = P(C 2 H 5)3 ; P(环-C 6 H 11)3 ; 12(C 2 H 5)2 P (CH 2)4 P(C 2 H ^ 5)2),得到酰基衍生物的Ni(CN)(COC 6 H ^ 5)(P)ñ(ñ = 1,2),在过量的CO的存在下,经过还原消除C 6 H 5COCN。已经表明,C 6 H 5 COCN与NiP n(n = 2,4)配合物反应生成分子加合物,其中有机试剂通过CO双键与镍原子配位。这些加合物在环境条件下不稳定,并分解为Ni(CN)(C 6 H 5)(P)2和羰基(膦基)镍(0)配合物。
Reactions of dioxygen with benzylnickel complexes
作者:G. Favero、Sacid Issa、A. Turco、U. Vettori
DOI:10.1016/0022-328x(86)80441-7
日期:1986.11
The benzyl complexes Ni(X)(CH2C6H5)(PCy3) (X = Cl, CN; Cy = cyclohexyl) react with molecular oxygen to give benzaldehyde and benzyl alcohol as main oxidation products. The ratio of the two products is strongly dependent on the nature of X and is also influenced by the solvent and the temperature. Isotopic labelling and mass spectra show that the hydrogen atoms necessary for the formation of the benzyl
苄基配合物Ni(X)(CH 2 C 6 H 5)(PCy 3)(X = Cl,CN; Cy =环己基)与分子氧反应生成苯甲醛和苯甲醇作为主要氧化产物。两种产物的比例在很大程度上取决于X的性质,并且还受溶剂和温度的影响。同位素标记和质谱表明,形成苄醇所需的氢原子由膦配体提供。分离和的氯化物通过常规的光谱技术表征复杂(IR,1 H ^ 31 P NMR,可见光谱)提供有利于一个η的证据3 -τ苄基结构的化合物。
A key intermediate in nickel-catalysed butadiene dimerisation; its identity in solution and in the solid state
作者:J. M. Brown、B. T. Golding、M. J. Smith
DOI:10.1039/c29710001240
日期:——
An i.r. spectroscopic study of 1-h1-6,7,8-h3-cis-2-trans-6-octadienediyltricyclohexylphosphinenickel(0) and its dodecadeuterio-analogue shows that this structure persists in solution and in the solidstate, and provides no evidence for a rearrangement in the solidstate to the bisbutadiene complex.