Zinc complexes supported by multidentate aminophenolate ligands: synthesis, structure and catalysis in ring-opening polymerization of rac-lactide

Dalton Transactions : an International Journal of Inorganic Chemistry
Liying Wang, Haiyan Ma

Abstract

Monomeric zinc silylamido and ethyl complexes bearing tetradentate aminophenolato ligands [(DNNO)ZnR] (D = NMe(2), OMe; R = N(SiMe(3))(2) (1-5, 8), Et (6, 7, 9, 10)), were isolated from the reaction of Zn[N(SiMe(3))(2)](2) or ZnEt(2) and one equivalent of aminophenols {aryl-CH(2)N[(CH(2))(2)NMe(2)]CH(2)-phenol} in moderate to high yields. The monomeric nature of these complexes was further confirmed by X-ray diffraction studies of silylamido complexes 1, 3 and ethyl complexes 7, 9, 10. The methoxy or N,N-dimethylamino group of the aryl unit does not coordinate with the metal center in the solid state, only the remaining three donors of the ligand and silylamido or ethyl group interact with zinc center constructing a distorted tetrahedral coordination geometry at the metal center. All these zinc complexes efficiently initiated the ring-opening polymerization of rac-lactide, and the polymerization runs were better controlled in the presence of isopropanol, giving atactic PLAs end-capped with isopropyl ester and hydroxyl groups. The structure of the ancillary ligands showed some influence on the catalytic activity and selectivity of the corresponding zinc complexes. The introduction of bulky ortho-substituents on the phenoxy unit ...Continue Reading

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Citations

Sep 1, 2016·Inorganic Chemistry·Tannaz EbrahimiParisa Mehrkhodavandi
Jul 7, 2012·Journal of the American Chemical Society·Insun YuParisa Mehrkhodavandi
May 7, 2011·Journal of the American Chemical Society·Yann SarazinJean-François Carpentier
Mar 26, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Katalin Devaine-PressingChristopher M Kozak
Aug 12, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Bijja RajashekharVenkatachalam Ramkumar
Jun 8, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Yong HuangYing Yang
Nov 7, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Pargol DaneshmandFrank Schaper
Apr 19, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Nduka IkpoFrancesca M Kerton
Dec 7, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Jakub WojtaszakJolanta Ejfler
Feb 16, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Wei-Yi LuHsuan-Ying Chen
Jan 22, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Sorin-Claudiu RoşcaYann Sarazin
Aug 31, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Yi LiuChristopher M Kozak
Feb 26, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Yong HuangPhilip Mountford
Sep 27, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Kimberly A GerlingJoseph M Fritsch
Jul 11, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Ruiguo ZhaoHaiyan Ma
Aug 17, 2019·Acta Crystallographica. Section E, Crystallographic Communications·Brendan J GrazianoMatthias Zeller
Jan 3, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Rebecca K DeanChristopher M Kozak
Jan 24, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Shaodi SongYang Yang
Aug 20, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Hui-Ju ChuangHsuan-Ying Chen

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