Correlation of Metal Spin State with Catalytic Reactivity: Polymerizations Mediated by α-Diimine-Iron Complexes

Correlation of Metal Spin State with Catalytic Reactivity: Polymerizations Mediated by α-Diimine-Iron Complexes

The mechanism of styrene polymerization by α‐diimine iron complexes correlates with the metal spin state of the catalyst. Experimental and theoretical studies indicate that high‐spin catalysts are halogenophilic, resulting in atom transfer radical polymerization (ATRP), while intermediate‐spin compl...

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Veröffentlicht in:Angewandte Chemie International Edition 2006-02, Vol.45 (8), p.1241-1244
Hauptverfasser: Shaver, Michael P., Allan, Laura E. N., Rzepa, Henry S., Gibson, Vernon C.
Format: Artikel
Sprache:eng
Schlagworte:
Catalysis
homogeneous catalysis
Imines - chemistry
iron
Iron - chemistry
Metals - chemistry
Models, Chemical
Molecular Structure
polymerization
Polymers - chemistry
spin state
α-diimines
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Zusammenfassung:The mechanism of styrene polymerization by α‐diimine iron complexes correlates with the metal spin state of the catalyst. Experimental and theoretical studies indicate that high‐spin catalysts are halogenophilic, resulting in atom transfer radical polymerization (ATRP), while intermediate‐spin complexes are carbophilic giving rise to catalytic chain transfer (CCT, see graph).
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200502985