4 years ago

Di-Zinc–Aryl Complexes: CO2 Insertions and Applications in Polymerisation Catalysis

Di-Zinc–Aryl Complexes: CO2 Insertions and Applications in Polymerisation Catalysis
Charles Romain, Jennifer A. Garden, Gemma Trott, Andrew J. P. White, Antoine Buchard, Charlotte K. Williams
Two new di-zinc–aryl complexes, [LZn2Ph2] and [LZn2(C6F5)2], coordinated by a diphenol tetraamine macrocyclic ligand have been prepared and fully characterised, including by single-crystal X-ray diffraction experiments. The complexes’ reactivities with monomers including carbon dioxide, cyclohexene oxide, phthalic anhydride, isopropanol and phenol were investigated using both experimental studies and density functional theory calculations. In particular, [LZn2Ph2] readily inserts carbon dioxide to form a carboxylate, at 1 bar pressure, whereas [LZn2(C6F5)2] does not react. Under these conditions [LZn2Ph2] shows moderate activity in the ring-opening copolymerisation of cyclohexene oxide/carbon dioxide (TOF=20 h−1), cyclohexene oxide/phthalic anhydride (TOF=33 h−1) and the ring-opening polymerisations of rac-lactide (TOF=99 h−1) and ϵ-caprolactone (TOF=5280 h−1). Versatile catalysis: Reactivity studies of zinc–aryl complexes towards carbon dioxide, alcohols, epoxides and anhydrides are investigated using a combination of experimental methods and density functional theory calculations. The catalyst systems are active for both ring-opening copolymerisation of epoxide with CO2 or anhydrides, and the ring-opening polymerisation of lactones.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201701013

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.