Abstract
A new yttrium(iii) complex with the pincer type bis(phosphinophenyl)amide ligand was synthesized and its activity and selectivity in the isoprene polymerization reaction was studied. An ultrahigh molecular weight polyisoprene with a > 99% content of 1,4-cis units was obtained.
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This work was fi nancially supported by the Russian Science Foundation (Project No. 19-73-10185). Ligands were synthesized by S. A. Rzhevskiy and M. S. Nechaev within the framework of the Russian state assignment (A. V. Topchiev Institute of Petrochemical Synthesis of the RAS). Polymer samples were characterized using scientifi c equipment of the X-Ray Structural Center of the A. N. Nesmeyanov Institute of Organoelement Compounds of the RAS with the fi nancial support of the Ministry of Science and Higher Education of the Russian Federation.
The authors are grateful to the “Biospectrotomography” Center for Collective Use of the Moscow State University for providing an NMR spectrometer for re cording spectra.
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Dzhevakov, P.B., Topchiy, M.A., Ageshina, A.A. et al. Comparative activity of yttrium(iii) pincer complexes in isoprene polymerization. Russ Chem Bull 69, 2307–2311 (2020). https://doi.org/10.1007/s11172-020-3038-6
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DOI: https://doi.org/10.1007/s11172-020-3038-6