Unprecedented Polymerization of ε-Caprolactone Initiated by a Single-Site Lanthanide Borohydride Complex, [Sm(η-C5Me5)2(BH4)(thf)]: Mechanistic Insights

Unprecedented Polymerization of ε-Caprolactone Initiated by a Single-Site Lanthanide Borohydride Complex, [Sm(η-C5Me5)2(BH4)(thf)]: Mechanistic Insights

The monoborohydride lanthanide complex [Sm(Cp*)2(BH4)(thf)] (1 a) (Cp* = η‐C5Me5), has been successfully used for the controlled ring‐opening polymerization of ε‐caprolactone (ε‐CL). The organometallic samarium(III) initiator 1 a produces, in quantitative yields, α,ω‐dihydroxytelechelic poly(ε‐capro...

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Veröffentlicht in:Chemistry : a European journal 2004-08, Vol.10 (16), p.4054-4062
Hauptverfasser: Palard, Isabelle, Soum, Alain, Guillaume, Sophie M.
Format: Artikel
Sprache:eng
Schlagworte:
borohydride
hydroxytelechelic
lactones
rare-earth metal
ring-opening polymerization
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Zusammenfassung:The monoborohydride lanthanide complex [Sm(Cp*)2(BH4)(thf)] (1 a) (Cp* = η‐C5Me5), has been successfully used for the controlled ring‐opening polymerization of ε‐caprolactone (ε‐CL). The organometallic samarium(III) initiator 1 a produces, in quantitative yields, α,ω‐dihydroxytelechelic poly(ε‐caprolactone) displaying relatively narrow polydispersity indices (
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.200400319