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.
Reactions of low-valent metal complexes with fluorocarbons. Part XVII. Tertiary arsine–nickel complexes
作者:Jane Browning、M. Green、F. G. A. Stone
DOI:10.1039/j19710000453
日期:——
(PhMe2As)4Ni to give (PhMe2As)2[graphic omitted]. The complex [o-C6H4(AsMe2)2][graphic omitted], prepared from 1,5-C8H12[graphic omitted], reacts with (CF3)2CO and with (CF3)2CNH to form the five-membered ring compounds [o-C6H4(AsMe2)2] [graphic omitted] (X = O or NH). Bis-(π-2-methylallyl)nickel and tetrafluoroethylene react to form a complex containing two C2F4 groups per nickel atom.
用四氟乙烯或三氟乙烯处理L 4 Ni [L = PhAsMe 2,L 2=o- C 6 H 4(AsMe 2)2 ]分别得到稳定的化合物[省略图示]和[省略图示]。氯和溴代三氟乙烯与(PhMe 2 As)4 Ni反应,得到乙烯基化合物(PhMe 2 As)2 Ni(CF:CF 2)X(X = Cl或Br)。类似地,1,1-二氯-2,2-二氟乙烯和1,2-二氯-1,2-二氟乙烯得到(PhMe 2 As)2 Ni(CCl:CF 2)Cl和(PhMe2 As) 2 Ni(CF:CFCl)Cl分别为顺式和反式乙烯基异构体的混合物。六氟丁酸酯-1,3-二烯与(PhMe 2 As) 4 Ni反应,得到(PhMe 2 As) 2 [省略图示]。由1,5-C 8 H 12 [省略图]制备的络合物[ o -C 6 H 4(AsMe 2) 2 ] [省略图]与(CF 3) 2 CO和(CF 3) 2反应。 CNH形成五元环化合物[
β-Oxo-δ-diimine Nickel Complexes: A Comparison of Tautomeric Active Species in Ethylene Polymerization Catalysis
作者:Hsin-Chun Chiu、Adam J. Pearce、Peter L. Dunn、Christopher J. Cramer、Ian A. Tonks
DOI:10.1021/acs.organomet.6b00256
日期:2016.6.27
complexes have a second binding pocket, of which the free “arm” can exist as either an enamine (e.g., 8, BODEI, β-oxo-δ-enamineiminato) or imine (e.g., 3, BODII, β-oxo-δ-imineiminato) tautomer. The identity of the tautomer in the secondary Ni coordination sphere has a significant effect on ethylene polymerization behavior: the enamine tautomer, which hydrogen bonds to the central O atom and is in conjugation
报道了一系列β-氧代-δ-二亚胺(BODDI)配体的单金属和双金属镍烷基配合物。单金属配合物具有第二个结合袋,其中的游离“臂”可以作为烯胺(例如,8,BODEI,β-氧代-δ-烯胺亚胺)或亚胺(例如,3,BODII,β-氧代- δ-亚胺亚氨基)互变异构体。二级 Ni 配位球中互变异构体的特性对乙烯聚合行为有显着影响:与中心 O 原子氢键并与 N、O 骨架螯合物共轭的烯胺互变异构体明显更富电子,并且产生比亚胺互变异构体低得多的分子量聚合物,亚胺互变异构体从Ni旋转到远端位置并且对聚合几乎没有影响。用 M(HMDS) 对第二个结合口袋进行去质子化 (M = Li, Na, K) 产生 Ni-碱金属异双金属配合物 3Li、3Na 和 3K。去质子化的碱金属烯酰胺表现出与中性亚胺复合物相似的乙烯聚合行为...
Pyridinecarboxamidato−Nickel(II) Complexes
作者:Bun Yeoul Lee、Xianhui Bu、Guillermo C. Bazan
DOI:10.1021/om010576c
日期:2001.12.1
inecarboxamide provides [N-(2,6-diisopropyl)phenyl-2-pyridinecarboxamidatotris(pentafluorophenyl)borate-κ2N,N]Ni(η3-CH2CMeCH2) (4) in 92% yield. The solid-statestructures of 3 and 4 were determined by X-ray diffraction techniques. The intramolecular metrical parameters are consistent with substantial partial positive charge at the nickel atom. Deprotonation of N-(2,6-diisopropyl)phenyl-2-pyridinecarboxamide
New η6-arene complexes of nickel(II): polyarene and fused arene systems
作者:Seok-Burm Choe、Kenneth J. Klabunde
DOI:10.1016/0022-328x(89)88101-x
日期:1989.1
Two reactions schemes have been employed to prepare a series of polyarene and fused arene-Ni(SiCl3)2 complexes. The first method was based on arene ⇄ arene′ exchange equilibria, and the second employed the production of the Ni(SiCl3)2 moiety in the presence of the desired arene by the reaction of (allyl)2Ni derivatives with HSiCl3. Arenes employed were biphenyl, 4,4′-dimethylbiphenyl, diphenylmethane