Diamidoamine Aluminum Complexes: Synthesis, Structure, L–Lactide and ϵ‐Caprolactone Polymerization. Issue 38 (8th October 2021)

• Record Type: Journal Article
• Authors: Kuchuk, Ekaterina A.; Kireenko, Marina M.; Mankaev, Badma N.; Zaitsev, Kirill V.; Churakov, Andrei V.; Lermontova, Elmira Kh.; Kuz'mina, Lyudmila G.; Oprunenko, Yuri F.; Zhirnov, Artem E.; Zaitseva, Galina S.; Karlov, Sergey S.
• Is Part Of: ChemistrySelect. Volume 6:Issue 38(2021)
• Page Start: 10243
• Page End: 10249
• Publication Date: 2021-10-08
• Subjects: aluminum -- diamidoamine ligand -- ring-opening polymerization -- transmetallation -- X-ray crystallography; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202102276
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: A series of methyl and chlorido aluminum complexes decorated with diamidoamine ligands with different number of carbon atoms in the alkyl chains were prepared via methane elimination, salt methatesis route, transmetallation strategy or chlorination. They were investigated by various methods including 19 F, 27 Al NMR spectroscopy and showed to be active catalysts of ring‐opening polymerization of ϵ‐Cl and L−La. Abstract : A new class of aluminum complexes based on pentafluorophenyl amido ligands has been prepared via reaction of free ligands with AlMe3 . The intermediate formation of dimethyl aluminum complexes took place. Monomethyl aluminum complexes can be also prepared by reaction of tetrylenes and Me3 Al. The reaction of methyl aluminum complexes with chlorinating agents were studied. Aluminum complexes were characterized by means of 1 H, 13 C and 19 F NMR spectroscopy and used as catalysts in the ring‐opening polymerization of cyclic esters.