Zwitterionic bis(phenolate)amine lanthanide complexes for the ring-opening polymerisation of cyclic esters.

Journal article

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.

Authors: Dyer, H; Huijser, S; Schwarz, A; Wang, C; Duchateau, R

• Publication status: Published
• Journal: Dalton transactions (Cambridge, England : 2003)
• Issue: 1
• Pages: 32-35
• Publication date: 2008-01-01
• DOI: 10.1039/b714583g
• EISSN: 1477-9234
• ISSN: 1477-9226
• Language: English
• Keywords: Phenols; Molecular Structure; Catalysis; Lanthanoid Series Elements; Organometallic Compounds; Crystallography, X-Ray; Esters; Ligands; Cyclization