Polymer-Free Ethylene Oligomerization Using a Pyridine-Based Pincer PNP-Type of Ligand
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https://figshare.com/articles/dataset/Polymer_Free_Ethylene_Oligomerization_Using_a_Pyridine_Based_Pincer_PNP_Type_of_Ligand/2345533
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资源简介：
Di- and trivalent chromium complexes
of the pyridine-based ligand
[2,6-(Ph2PCH2)2 C5H3N]CrCl3 (1) and {[2,6-(Ph2CH2)2C5H3N]CrCl2}.(THF) (2) and their aluminate aggregates [2,6-(Ph2CH2)2C5H3NCrCl(μ-Cl)AlClMe2] (3), {[(2,6-(Ph2CH2)2C5H3NCrCl(μ-Cl)AlClEt2]}. (toluene)0.5 (4), {2,6-(Ph2CH2)2C5H3NCrEt(μ-Cl)2AlEt2}{AlCl3Et} (5), {2,6-(PPh2CH2) C5H3N (PPh2CH)Al(i-Bu)2(μ-Cl)Cr(μ-Cl)2Al(i-Bu)2}.(toluene)1.5 (6), and {[2,6-(PPh2CH2)2C5H3 N]2Cr} {(μ-Cl)[Al(i-Bu)3]2} (7) were prepared,
isolated, and their activities toward ethylene oligomerization tested.
While complexes 3, 5, and 6 were directly accessible by reacting catalyst precursor 1 with Me3Al, DEAC, and TIBA, respectively, complexes 4 and 7 were prepared using catalyst precursor 2 with DEAC and TIBA, respectively. All these complexes, with
the exception of 7, showed good activities for a polymer-free
ethylene oligomerization. Complex 7 contains cationic
chromium in its monovalent state and its encapsulation in an octahedral
ligand field as defined by two ligands is probably responsible for
its failure as a catalyst.
创建时间：
2016-02-18
