Zinc complexes with guanidine-pyridine hybrid ligands: anion effect and catalytic activity

Artjom Döring, Ulrich Flörke, Alexander Hoffmann, Matthew D. Jones, Dirk Kuckling, Janna Michaelis de Vasconcellos, Sonja Herres-Pawlis

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8 Citations (Scopus)
179 Downloads (Pure)

Abstract

The guanidine-pyridine ligands DMEGqu, TMGqu, and DMEGpy were reacted with zinc benzoate, zinc acetylacetonate, zinc bromide, zinc tetrafluoroborate, and zinc d,l-lactate in order obtain the corresponding complexes. The compounds were structurally characterized by X-ray crystallography and further characterized by NMR, IR, and MS measurements. All complexes were tested as initiators in the melt polymerization of d,l-lactide and the influence of the anion effect was studied. The bis(chelate) tetrafluoroborate complex 7 exhibited the highest activity.

Original languageEnglish
Pages (from-to)2147-2156
JournalZeitschrift für Anorganische und Allgemeine Chemie
Volume641
Issue number12-13
Early online date27 Aug 2015
DOIs
Publication statusPublished - Oct 2015

Keywords

  • Biodegradable polymers
  • Guanidine
  • Polylactide (PLA)
  • Ring-opening polymerization
  • Zinc

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