Highly selective chromium-based ethylene trimerisation catalysts with bulky diphosphinoamine ligands
作者:Kevin Blann、Annette Bollmann、John T. Dixon、Fiona M. Hess、Esna Killian、Hulisani Maumela、David H. Morgan、Arno Neveling、Stephanus Otto、Matthew J. Overett
DOI:10.1039/b412431f
日期:——
In situ prepared chromium catalysts containing bulky diphosphinoamine (PNP) ligands, upon activation with MAO, are extremely efficient catalysts for the trimerisation of ethylene to 1-hexene.
Steric activation of chelate catalysts: efficient polyketone catalysts based on four-membered palladium(ii) diphosphine chelates
作者:Stephen J. Dossett、Duncan F. Wass、Matthew D. Jones、Amy Gillon、A. Guy Orpen、James S. Fleming、Paul G. Pringle
DOI:10.1039/b010063n
日期:——
Palladium(II) complexes of ligands of the type
Ar2PCH2- PAr2 and
Ar2PN(Me)PAr2 (Ar = ortho-substituted phenyl
group) are very efficient catalysts for copolymerisation of CO and
C2H4.
Copper(I) Diphosphine Catalysts for C−N Bond Formation: Synthesis, Structure, and Ligand Effects
作者:Stephen Daly、Mairi F. Haddow、A. Guy Orpen、Giles T. A. Rolls、Duncan F. Wass、Richard L. Wingad
DOI:10.1021/om800139v
日期:2008.7.1
chelating ligand. The complexes have been screened for catalytic amidation reactions. Although in most cases only very low activity is observed, comparable with simple copper halide salts, notable exceptions are catalysts based on N,N-bis(diphenylphosphino)amine ligands, where a significant improvement in catalyst efficiency is observed. We propose the unusual electronic properties of these ligands may be
一系列含有双(二芳基膦基)丙烷,双(二芳基膦基)乙烷,双(二芳基膦基)甲烷和N,N-双(二芳基膦基)胺配体的铜(I)配合物(芳基= Ph,2-C 6 H 4( Me)或2-C 6 H 4(i -Pr))已合成。报道了所选氯化物衍生物的晶体结构。事实证明,该复杂结构对螯合配体的主链和P-取代基都非常敏感。已经针对催化酰胺化反应筛选了配合物。尽管在大多数情况下仅观察到非常低的活性,与简单的卤化铜盐相比,值得注意的例外是基于N,N的催化剂-双(二苯基膦基)胺配体,其中观察到催化剂效率的显着改善。我们提出这些配体的不同寻常的电子性能可能是它们在先前已使用硬供体配体的这些和其他催化反应中表现出不同性能的原因。
Nickel Ethylene Polymerization Catalysts Based on Phosphorus Ligands
作者:Neil A. Cooley、Simon M. Green、Duncan F. Wass、Katie Heslop、A. Guy Orpen、Paul G. Pringle
DOI:10.1021/om010705p
日期:2001.11.1
Nickel(II) complexes of ligands of the type Ar-2- PN(Me)PAr2 (Ar = ortho-substituted phenyl group) are highly active and poison-tolerant catalysts for the polymerization of ethylene.
POLYMERISATION PROCESS CATALYSED BY A BIDENTATE BISPHOSPHINE-GROUP VIII METAL COMPLEX