Ethylene oligomerisation chromium catalysts with unsymmetrical PCNP ligands
نویسندگان
چکیده
PCNP diphosphines, in conjunction with Cr(acac)3, are excellent ethylene oligomerisation catalysts high activity and selectivity towards both 1-hexene 1-octene formation.
منابع مشابه
Ethylene Oligomerisation Catalysts: Synthesis, Evaluation and Mechanistic Studies
The oligomerisation of ethylene to linear alpha olefins is an important industrial process for the production of polyethylene co-monomers, plasticizers, surfactants and waxes. With the ever increasing market demand for short chain linear alpha ole fins (1-butene, 1-hexene and 1-octene) there has been intensive research in both industry and academia on methods to selectively oligomerise ethylene...
متن کاملNew catalysts with unsymmetrical N-heterocyclic carbene ligands.
The importance of unsymmetrical N-heterocyclic carbenes (uNHCs) as ligands in metal-catalyzed reactions is undeniable. While uNHCs show similar properties as compared with symmetrical NHCs, dissymmetrization allows for further fine-tuning. The introduction of chelatization, hemilability, bifunctionality, shielding effects, and chirality-transfer influences the catalyst's stability, reactivity, ...
متن کاملHighly selective chromium-based ethylene trimerisation catalysts with bulky diphosphinoamine ligands.
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.
متن کاملHighly active chromium-based selective ethylene tri-/tetramerization catalysts supported by PNPO phosphazane ligands.
Novel Cr(iii) catalysts supported by PNPO phosphazane ligands of the type Ph2PN(R)P(Ph)OAr have been prepared, all of which, upon activation with MMAO-3A, are highly active in ethylene tri-/tetramerization with considerable selectivity. The effect of ligand substitution on the catalytic performance has been examined. The Cr precatalyst supported by the PNPO phosphazane ligand with an N-cyclohex...
متن کاملEthylene trimerisation and tetramerisation catalysts with polar-substituted diphosphinoamine ligands.
Chromium-based catalyst systems with polar-substituted diphosphinoamine ligands are selective for either trimerisation or tetramerisation of ethylene, depending on the position of the polar groups on the aryl rings.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Dalton Transactions
سال: 2021
ISSN: ['1477-9234', '1477-9226']
DOI: https://doi.org/10.1039/d1dt00287b