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Science China Chemistry

, Volume 62, Issue 4, pp 491–499 | Cite as

Halogen effects on phenylethynyl palladium(II) complexes for living polymerization of isocyanides: a combined experimental and computational investigation

  • Yaqi Wang
  • Yu Chen
  • Zhiqiang Jiang
  • Fang Liu
  • Fang Liu
  • Yuanyuan ZhuEmail author
  • Yong LiangEmail author
  • Zongquan WuEmail author
Articles
  • 35 Downloads

Abstract

Phenylethynyl palladium(II) complexes have proven to be effective catalysts for coordination polymerization of isocyanides. In this work, two new phenylethynyl palladium(II) initiators bearing bromide (1b) and iodide (1c) were synthesized and applied for living polymerization of aryl and alkyl isocyanides. The coordinated halogen anions can significantly influence the kinetics of polymerization, with the observed order of reaction rates being 1c (I)>1b (Br)>1a (Cl). Impressively, 1c not only accelerates the reaction rate in both the initiation stage and propagation stage, but also can polymerize less active monomers that cannot be reacted by 1a. DFT calculations were then employed to understand the detailed mechanism and the halogen effects in this insertion polymerization process.

Keywords

polyisocyanide halogen effect living polymerization palladium complex DFT calculation 

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Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (21771049, 21622402), the Fundamental Research Funds for the Central Universities, the National Thousand Young Talents Program, the Jiangsu Specially-Appointed Professor Plan, and the Natural Science Foundation of Jiangsu Province (BK20170631).

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11426_2018_9415_MOESM2_ESM.pdf (1.9 mb)
Halogen Effects on Phenylethynyl Palladium(II) Complexes for Living Polymerization of Isocyanides: A Combined Experimental and Computational Investigation
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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of TechnologyHefeiChina
  2. 2.State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical EngineeringNanjing UniversityNanjingChina

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