series of 1 : 1 adducts have been prepared by treating the bis-η3-allyl complexes of nickel, palladium and platinum with tertiary phosphines. Investigations of their structure in solution as well as in the crystal have shown that both 18-electron (η3-allyl)2ML complexes as well as 16-electron (η1-allyl)-(η3-allyl)ML complexes may be formed.
Intramolecular rearrangement of the imine–amide ligand within the nickel coordination sphere affected by carbon monoxide
作者:Peter B. Kraikivskii、Hans-Friedrich Klein、Vitaly V. Saraev、Nils E. Schlörer、Victoria V. Bocharova
DOI:10.1016/j.jorganchem.2011.07.022
日期:2011.10
The interactions of the nickel imine–amide allyl complex 1 with carbon monoxide and unsaturatedhydrocarbons have been studied. It is shown that this complex reacts readily with carbon monoxide to form the nickel(0) diimine carbonyl complex [(2-(1-propenyl)-[1,10]phenanthroline)Ni(CO)2] 2. During the process the ligand undergoes a deep transformation within the nickel coordination sphere. Specifically
Intrazeolite chemistry of nickel(0) complexes and Ni(0,II) clusters studied by EXAFS, solid-state NMR and FT-IR spectroscopy
作者:Thomas. Bein、Stephan J. McLain、David R. Corbin、Rodney D. Farlee、Karin. Moller、Galen D. Stucky、Geoffrey. Woolery、Dale. Sayers
DOI:10.1021/ja00214a024
日期:1988.3
adsorption from solution (Ni(CO)/sub 3/PMe/sub 3/, Ni(CO)/sub 2/(PMe/sub 3/)/sub 2/), and by synthesis inside the NaY supercage (Ni(CO)/sub 3/PMe/sub 3/, Ni(CO)/sub 3/(PPh/sub 2/CHMe/sub 2/), Ni(CO)/sub 3/P(tau-Bu)/sub 3/, Ni(PMe/sub 3/)/sub x/). The NaYNi(CO)/sub 3/(PPh/sub 2/CHMe/sub 2/) adduct is a ship-in-a bottle complex, i.e., the Ni complex is too largemore » to exit the zeolite supercage. The substitution
已经使用 EXAFS 和近边光谱研究了 NI(CO)/sub 4/ 在脱水沸石 Y 笼系统中的吸附、热分解和反应性,特别是监测氧化态和 Ni 连接的变化。Ni(CO)/sub 4/ 作为完整分子吸附在无阳离子沸石 Y、LiY 和 NaY 中。LiY和NaY中分子的对称性变化归因于阳离子--OC-Ni桥的形成。Ni(CO)/sub 4/NaY 加合物的热处理导致 CO 损失,同时形成双峰 Ni 相。除了较大的微晶 (5-30 nm) 外,Ni 的主要部分形成小簇(约 0.5 至 1.5 nm),粘附在沸石晶体的外表面。Ni(CO)/sub 4/NaY 用分子氧氧化成 NiONaY 在 295 K 以下几乎完成。NiO 小颗粒在高达 670 K 的温度下仍能稳定烧结。 镍-膦NaY 加合物是通过从溶液中直接吸附制备的 (Ni(CO)/sub 3/PMe/sub 3/, Ni(CO)/sub 2/(PMe)
The reactions of metallic mercury with π-allyl compounds of Ni, Pd and Pt
The reaction of metallic mercury with π-allyl compounds of nickel, palladium and platinum has been discussed. Nickel complexes do not react with mercury but palladium and platinum derivatives give the corresponding allylmercury halides. A reaction mechanism for π-allylpalladium chloride, for example, has been suggested, that involves the cleavage of the μ-halide bridges in the (π-C3H5PdCI) molecule
Ethylene Polymerization Using Discrete Nickel(II) Iminophosphonamide Complexes
作者:Russell L. Stapleton、Jianfang Chai、Nicholas J. Taylor、Scott Collins
DOI:10.1021/om051103z
日期:2006.5.1
during catalysis. Reaction of 5 with an equimolar amount of propene provides α-methylstyrene, the product of 1,2-insertion followed by β-H elimination. Complex 5 is not effective for polymerization or oligomerization of ethylene under a variety of conditions. The reactions of complex 5 with various phosphine scavengers were studied, and of these only Rh(acac)(C2H4)2 is both effective and selective for