Abstract
Unique features of earth-abundant transition-metal catalysts are reviewed in the context of catalytic carbon–carbon bond-forming reactions. Aryl-substituted bis(imino)pyridine iron and cobalt dihalide compounds, when activated with alkyl aluminum reagents, form highly active catalysts for the polymerization of ethylene. Open-shell iron and cobalt alkyl complexes have been synthesized that serve as single-component olefin polymerization catalysts. Reduced bis(imino)pyridine iron and cobalt dinitrogen compounds have also been discovered that promote the unique [2+2] cycloaddition of unactivated terminal alkenes. Studies of the electronic structure support open-shell intermediates, a deviation from traditional strong-field organometallic compounds that promote catalytic C−C bond formation.
Original language | English (US) |
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Pages (from-to) | 5170-5181 |
Number of pages | 12 |
Journal | Angewandte Chemie - International Edition |
Volume | 56 |
Issue number | 19 |
DOIs | |
State | Published - May 2 2017 |
All Science Journal Classification (ASJC) codes
- General Chemistry
- Catalysis
Keywords
- cobalt
- cycloaddition
- homogeneous catalysis
- iron
- polymerization