Reference of 50777-76-9, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 50777-76-9, C19H15OP. A document type is Article, introducing its new discovery.
A series of 2,6-dibenzhydryl substituted bulky Ni and Pd complexes containing P,N-chelating ligands, {[2,6-(Ph2CH)2-4-R-C6H2-N=CH-C6H4-2-PPh2]MX2; MX2 =NiBr2; R = Me (Ni1); R = F (Ni2); MX2 =PdCl2, R = Me (Pd1)}, have been prepared and used as catalyst precursors for ethylene oligo-/polymerization. Compared to the corresponding 2,6-diisopropyl Ni catalyst, these bulky Ni precatalysts activated by Et2AlCl exhibited excellent catalytic performance toward ethylene polymerization with activity of up to 1.90 × 105 g PE (mol Ni)?1 h?1, and result in semicrystalline PEs with high molecular weight. The catalytic performance of these bulky P,N-type complexes was significantly improved by introducing two ortho-dibenzhydryl on the N-aryl substituents. However, the formation of C10?C24 oligomers were generated using their palladium catalysts through ethylene oligomerization at high temperatures.
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Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate