Abstract
The reaction of Sm{N(SiMe3)2}3 with the bis(phenol)amines H2O2N(R) (H2O2N(R) = RCH2CH2N(2-HO-3,5-C6H2(t)Bu2)2; R = OMe, NMe2 or Me) gave exclusively zwitterions Sm(O2N(R))(HO2N(R)). For R = OMe or NMe2 these were efficient catalysts for the ring-opening polymerisation of epsilon-caprolactone and D,L-lactide with a tendency to form cyclic esters; in contrast, no polymerisation was observed for R = Me.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Catalysis
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Crystallography, X-Ray
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Cyclization
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Esters / chemical synthesis*
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Esters / chemistry
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Lanthanoid Series Elements / chemistry*
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Ligands
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Molecular Structure
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Organometallic Compounds* / chemical synthesis
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Organometallic Compounds* / chemistry
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Phenols / chemistry*
Substances
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Esters
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Lanthanoid Series Elements
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Ligands
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Organometallic Compounds
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Phenols