Switchable Ethylene Tri-/Tetramerization with High Activity: Subtle Effect Presented by Backbone-Substituent of Carbon-Bridged Diphosphine Ligands
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https://figshare.com/articles/dataset/Switchable_Ethylene_Tri_Tetramerization_with_High_Activity_Subtle_Effect_Presented_by_Backbone_Substituent_of_Carbon_Bridged_Diphosphine_Ligands/2369992
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资源简介：
The
effect of backbone-substituent of carbon-bridged diphosphine ligands
of the types {Ph2PCH(R)CH2PPh2} and
{Ph2PC(R)CHPPh2} on the catalyst performance
in ethylene oligomerization has been explored. Cr complex bearing
a methyl-substituted diphosphine ligand with saturated linker exhibited
the highest selectivity of 64.7% toward 1-octene. Cr complex bearing
a tert-butyl-substituted diphosphine ligand with unsaturated linker
showed a high activity of 4238 kg/(g Cr/h) at 40 bar and 40 °C
and achieved a high total selectivity of 79.1% toward valuable 1-hexene
and 1-octene. The 1-hexene selectivity could be improved up to 55.2%
(19.4% 1-octene) at 20 bar and 80 °C. Some of the new complexes
are even more active than the well-known most efficient ethylene tri/tetramerization
catalyst systems.
创建时间：
2016-02-18
