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• W2097472526 endingPage "2684" @default.
• W2097472526 startingPage "2674" @default.
• W2097472526 abstract "Abstract A series of rare‐earth‐metal–hydrocarbyl complexes bearing N‐type functionalized cyclopentadienyl (Cp) and fluorenyl (Flu) ligands were facilely synthesized. Treatment of [Y(CH 2 SiMe 3 ) 3 (thf) 2 ] with equimolar amount of the electron‐donating aminophenyl‐Cp ligand C 5 Me 4 H‐C 6 H 4 ‐ o ‐NMe 2 afforded the corresponding binuclear monoalkyl complex [({C 5 Me 4 ‐C 6 H 4 ‐ o ‐NMe(μ‐CH 2 )}Y{CH 2 SiMe 3 }) 2 ] ( 1 a ) via alkyl abstraction and CH activation of the NMe 2 group. The lutetium bis(allyl) complex [(C 5 Me 4 ‐C 6 H 4 ‐ o ‐NMe 2 )Lu(η 3 ‐C 3 H 5 ) 2 ] ( 2 b ), which contained an electron‐donating aminophenyl‐Cp ligand, was isolated from the sequential metathesis reactions of LuCl 3 with (C 5 Me 4 ‐C 6 H 4 ‐ o ‐NMe 2 )Li (1 equiv) and C 3 H 5 MgCl (2 equiv). Following a similar procedure, the yttrium‐ and scandium–bis(allyl) complexes, [(C 5 Me 4 ‐C 5 H 4 N)Ln(η 3 ‐C 3 H 5 ) 2 ] (Ln=Y ( 3 a ), Sc ( 3 b )), which also contained electron‐withdrawing pyridyl‐Cp ligands, were also obtained selectively. Deprotonation of the bulky pyridyl‐Flu ligand (C 13 H 9 ‐C 5 H 4 N) by [Ln(CH 2 SiMe 3 ) 3 (thf) 2 ] generated the rare‐earth‐metal–dialkyl complexes, [(η 3 ‐C 13 H 8 ‐C 5 H 4 N)Ln(CH 2 SiMe 3 ) 2 (thf)] (Ln=Y ( 4 a ), Sc ( 4 b ), Lu ( 4 c )), in which an unusual asymmetric η 3 ‐allyl bonding mode of Flu moiety was observed. Switching to the bidentate yttrium–trisalkyl complex [Y(CH 2 C 6 H 4 ‐ o ‐NMe 2 ) 3 ], the same reaction conditions afforded the corresponding yttrium bis(aminobenzyl) complex [(η 3 ‐C 13 H 8 ‐C 5 H 4 N)Y(CH 2 C 6 H 4 ‐ o ‐NMe 2 ) 2 ] ( 5 ). Complexes 1 – 5 were fully characterized by 1 H and 13 C NMR and X‐ray spectroscopy, and by elemental analysis. In the presence of both [Ph 3 C][B(C 6 F 5 ) 4 ] and Al i Bu 3 , the electron‐donating aminophenyl‐Cp‐based complexes 1 and 2 did not show any activity towards styrene polymerization. In striking contrast, upon activation with [Ph 3 C][B(C 6 F 5 ) 4 ] only, the electron‐withdrawing pyridyl‐Cp‐based complexes 3 , in particular scandium complex 3 b , exhibited outstanding activitiy to give perfectly syndiotactic ( rrrr >99 %) polystyrene, whereas their bulky pyridyl‐Flu analogues ( 4 and 5 ) in combination with [Ph 3 C][B(C 6 F 5 ) 4 ] and Al i Bu 3 displayed much‐lower activity to afford syndiotactic‐enriched polystyrene." @default.
• W2097472526 created "2016-06-24" @default.
• W2097472526 creator A5011196991 @default.
• W2097472526 creator A5047110002 @default.
• W2097472526 creator A5054528721 @default.
• W2097472526 date "2012-01-26" @default.
• W2097472526 modified "2023-10-18" @default.
• W2097472526 title "Rare-Earth-Metal-Hydrocarbyl Complexes Bearing Linked Cyclopentadienyl or Fluorenyl Ligands: Synthesis, Catalyzed Styrene Polymerization, and Structure-Reactivity Relationship" @default.
• W2097472526 cites W1484974838 @default.
• W2097472526 cites W1868937422 @default.
• W2097472526 cites W1965076437 @default.
• W2097472526 cites W1968082996 @default.
• W2097472526 cites W1968628879 @default.
• W2097472526 cites W1969538509 @default.
• W2097472526 cites W1977230144 @default.
• W2097472526 cites W1978057980 @default.
• W2097472526 cites W1978900507 @default.
• W2097472526 cites W1979721768 @default.
• W2097472526 cites W1980037965 @default.
• W2097472526 cites W1981141489 @default.
• W2097472526 cites W1983271357 @default.
• W2097472526 cites W1985960007 @default.
• W2097472526 cites W1986989732 @default.
• W2097472526 cites W1987037609 @default.
• W2097472526 cites W1988148879 @default.
• W2097472526 cites W1991128442 @default.
• W2097472526 cites W1991441490 @default.
• W2097472526 cites W1991629018 @default.
• W2097472526 cites W1995334952 @default.
• W2097472526 cites W1995413856 @default.
• W2097472526 cites W1997374390 @default.
• W2097472526 cites W1997652393 @default.
• W2097472526 cites W1997870370 @default.
• W2097472526 cites W1999901687 @default.
• W2097472526 cites W2004161699 @default.
• W2097472526 cites W2005386158 @default.
• W2097472526 cites W2010110135 @default.
• W2097472526 cites W2013549613 @default.
• W2097472526 cites W2016198944 @default.
• W2097472526 cites W2018482316 @default.
• W2097472526 cites W2021002469 @default.
• W2097472526 cites W2021771224 @default.
• W2097472526 cites W2023487269 @default.
• W2097472526 cites W2023985763 @default.
• W2097472526 cites W2024935698 @default.
• W2097472526 cites W2025083059 @default.
• W2097472526 cites W2027099041 @default.
• W2097472526 cites W2028296095 @default.
• W2097472526 cites W2029579581 @default.
• W2097472526 cites W2032117139 @default.
• W2097472526 cites W2032337648 @default.
• W2097472526 cites W2034020100 @default.
• W2097472526 cites W2034864445 @default.
• W2097472526 cites W2035377373 @default.
• W2097472526 cites W2037299621 @default.
• W2097472526 cites W2039247445 @default.
• W2097472526 cites W2039522937 @default.
• W2097472526 cites W2040351681 @default.
• W2097472526 cites W2041005133 @default.
• W2097472526 cites W2041714442 @default.
• W2097472526 cites W2043694320 @default.
• W2097472526 cites W2047806045 @default.
• W2097472526 cites W2048091967 @default.
• W2097472526 cites W2048611587 @default.
• W2097472526 cites W2052038500 @default.
• W2097472526 cites W2052894401 @default.
• W2097472526 cites W2053906110 @default.
• W2097472526 cites W2055060256 @default.
• W2097472526 cites W2058640601 @default.
• W2097472526 cites W2059205384 @default.
• W2097472526 cites W2059555345 @default.
• W2097472526 cites W2060283969 @default.
• W2097472526 cites W2060708025 @default.
• W2097472526 cites W2063547496 @default.
• W2097472526 cites W2064882105 @default.
• W2097472526 cites W2067964137 @default.
• W2097472526 cites W2072461810 @default.
• W2097472526 cites W2075733276 @default.
• W2097472526 cites W2076903778 @default.
• W2097472526 cites W2079055885 @default.
• W2097472526 cites W2079280789 @default.
• W2097472526 cites W2083543185 @default.
• W2097472526 cites W2084427563 @default.
• W2097472526 cites W2085617074 @default.
• W2097472526 cites W2087075116 @default.
• W2097472526 cites W2087262575 @default.
• W2097472526 cites W2090329427 @default.
• W2097472526 cites W2092572654 @default.
• W2097472526 cites W2094729547 @default.
• W2097472526 cites W2098251725 @default.
• W2097472526 cites W2100382008 @default.
• W2097472526 cites W2103986047 @default.
• W2097472526 cites W2109736760 @default.
• W2097472526 cites W2113310239 @default.
• W2097472526 cites W2116505719 @default.
• W2097472526 cites W2116583059 @default.
• W2097472526 cites W2118431584 @default.
• W2097472526 cites W2119884882 @default.

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