Cationic Aluminum Alkyl Complexes Incorporating Aminotroponiminate Ligands

Ihara, Eiji; Young, Victor G.; Jordan, Richard F.

doi:10.1021/ja9817444

Cited by 150 publications

(143 citation statements)

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“…Catalyst 35e showed lower catalytic activity (80 g-PE/mol-cat h) for the ethylene polymerization, when activated by 1 equiv. of B(C 6 F 5 ) 3 in toluene under 1 atom of ethylene, than those of imidinate-aluminum system (700 g-PE/mol-cat h) [23] and aminotroponiminate-aluminum system (2600 g-PE/mol-cat h) [24].…”

Section: ð10þmentioning

confidence: 88%

Uniqueness and versatility of iminopyrrolyl ligands for transition metal complexes

Mashima

Tsurugi

2005

Journal of Organometallic Chemistry

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Section: ð10þmentioning

confidence: 88%

Uniqueness and versatility of iminopyrrolyl ligands for transition metal complexes

Mashima

Tsurugi

2005

Journal of Organometallic Chemistry

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“…[Ph3C]B(C6F5)4 [30], [2-(2-bromophenyl)ethynyl]trimethylsilane derivatives [31], 2-(1-hexynyl)bromobenzene [21], 1a [19] and 1c [21] were synthesized according to the previously reported methods. The NMR spectral measurements were performed on an Agilent 400-MR NMR (Agilent Technologies Co., Santa Clara, CA, USA) or a Bruker AV400M spectrometers The reaction mechanism of the intramolecular chain hydrosilylation is described in Scheme 1.…”

Section: Methodsmentioning

confidence: 99%

Intramolecular Chain Hydrosilylation of Alkynylphenylsilanes Using a Silyl Cation as a Chain Carrier

et al. 2016

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Diorganyl[2-(trimethylsilylethynyl)phenyl]silanes 1a-c and methyl-substituted phenylsilanes 1d and 1e were treated with a small amount of trityl tetrakis(pentafluorophenyl)borate (TPFPB) as an initiator in benzene to afford the corresponding benzosiloles (2a-e) in moderate to good yields. However, no reaction was observed for the reaction using [2-(1-hexynyl)phenyl]diisopropylsilane lf. The methyl substituent was tolerated under the reaction conditions and increased the yield of the corresponding benzosilole depending on the substitution position. From the result using 1f, the current reaction was found to require the trimethylsilyl group, which can stabilize intermediary alkenyl carbocations by the β-silyl effect. The current reaction can be considered an intramolecular chain hydrosilylation of alkynylarylsilanes involving silyl cations as chain carriers. Therefore, the silyl cations generated by hydride abstraction from hydrosilanes 1 with the trityl cation causes intramolecular electrophilic addition to the C-C triple bond to form ethenyl cations, which abstract a hydride from 1 to afford benzosiloles 2 with the regeneration of the silyl cations.

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“…The compound 23 could be activated for ethylene polymerization by 1 eq of [Ph 3 C][B(C 6 F 5 ) 4 ] and the activity of 3.05 kg PE/ (mol h atm) was observed [71]. The compound 25 showed similar activity toward ethylene polymerization [72,73]. The system of anionic cobalt complex of a chelate containing imine and amide nitrogen centers 25 and MAO is active for ethylene and propylene [76].…”

Section: Other Ligandsmentioning

confidence: 99%

“…Selected examples, 23-29, of 4-coordinated complexes based on miscellaneous ligands are shown in [71][72][73][74][75]. The compound 23 could be activated for ethylene polymerization by 1 eq of [Ph 3 C][B(C 6 F 5 ) 4 ] and the activity of 3.05 kg PE/ (mol h atm) was observed [71].…”

Section: Other Ligandsmentioning

confidence: 99%