|
Type |
Poster Presentation |
Area |
Inorganic Chemistry |
Room No. |
Grand Ballroom |
Time |
10월 19일 (금요일) 11:00~12:30 |
Code |
INOR.P-30 |
Subject |
Polyhedral oligomeric silsesquioxane-conjugated bis(diphenylphosphino)amine ligand for chromium(III) catalyzed ethylene trimerization and tetramerization |
Authors |
Hoseong Lee, Soon Hyeok Hong* Division of Chemistry, Seoul National University, Korea |
Abstract |
Polyhedral oligomeric silsesquioxanes (POSSs) were attached to conventional bis(diphenylphosphino)amine
(PNP) ligand as solubility-enhancing materials for catalytic ethylene trimerization and tetramerization.
Differently functionalized arylphosphine ligands of the type (Ph)2PN(POSS)P(Ph)(ArR) (R=functional groups) were systematically developed, and their corresponding chromium(III) complexes were formed. The developed precatalysts exhibited excellent tolerance in solvents, including even low-carbon-number hydrocarbons such as n-pentane, n-hexane, or cyclohexane. In particular, the ortho-fluorophenyl-substituted complex showed higher stability even at higher temperatures above 120 °C. The ortho-OCF3–phenyl-substituted complex showed outstanding catalytic activity, which reached 2287 kg/g Cr/h at 30 bar. |
E-mail |
lhs0505@snu.ac.kr |
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