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• W2906333810 abstract "Two C–C bridged Ni(II) complexes bearing β‐keto‐9‐fluorenyliminato ligands with electron‐withdrawing groups (─CF 3 ), Ni{PhC(O)CHC[N(9‐fluorenyl)]CF 2 } 2 (Ni 1 ) and Ni{CF 3 C(O)CHC[N(9‐fluorenyl)]Ph} 2 (Ni 2 ), were synthesized by metal coordination reaction and different in situ bonding mechanisms. The C–C bridged bonds of Ni 1 were formed by in situ intramolecular trifluoromethyl and 9‐fluorenyl carbon–carbon cross‐coupling reaction and those of Ni 2 were formed by in situ intramolecular 9‐fluorenyl carbon–carbon radical coupling reaction mechanism. The obtained complexes were characterized using 1 H NMR spectroscopy and elemental analyses. The crystal and molecular structures of Ni 1 and Ni 2 with C–C bridged configuration were determined using X‐ray diffraction. Ni 1 and Ni 2 were used as catalysts for norbornene (NB) polymerization after activation with B(C 6 F 5 ) 3 and the catalytic activities reached 10 6 g polymer mol Ni −1 h −1 . The copolymerization of NB and styrene catalyzed by the Ni 1 /B(C 6 F 5 ) 3 system showed high activity (10 5 g polymer mol Ni −1 h −1 ) and the catalytic activities decreased with increasing feed content of styrene. All vinyl‐type copolymers exhibited high molecular weight (10 4 g mol −1 ), narrow molecular weight distribution ( M w / M n = 1.71–2.80), high styrene insertion ratios (11.13–50.81%) and high thermal stability ( T d > 380°C) and could be made into thin films with high transparency in the visible region (400–800 nm)." @default.
• W2906333810 created "2019-01-01" @default.
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• W2906333810 date "2018-12-21" @default.
• W2906333810 modified "2023-10-15" @default.
• W2906333810 title "C-C bridged Ni(II) complexes bearing β-keto-9-fluorenyliminato ligands prepared by different <i>in situ</i> bonding mechanisms and their use in catalytic (co)polymerization of norbornene and styrene" @default.
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• W2906333810 doi "https://doi.org/10.1002/aoc.4694" @default.
• W2906333810 hasPublicationYear "2018" @default.
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