Controlled hydrolysis of AlMe 3 to tetramethylalumoxane and a new look at incipient adducts with water.

Autor: Korona K; Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland. janusz.lewinski@pw.edu.pl., Justyniak I; Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. ijustyniak@ichf.edu.pl., Pogrebetsky J; Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. ijustyniak@ichf.edu.pl., Lemieszka M; Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland. janusz.lewinski@pw.edu.pl., Bernatowicz P; Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. ijustyniak@ichf.edu.pl., Pietrzykowski A; Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland. janusz.lewinski@pw.edu.pl., Kubas A; Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. ijustyniak@ichf.edu.pl., Lewiński J; Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland. janusz.lewinski@pw.edu.pl.; Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. ijustyniak@ichf.edu.pl.
Jazyk: angličtina
Zdroj: Chemical communications (Cambridge, England) [Chem Commun (Camb)] 2024 Aug 27; Vol. 60 (70), pp. 9392-9395. Date of Electronic Publication: 2024 Aug 27.
DOI: 10.1039/d4cc03672g
Abstrakt: We present an efficient route to tetramethylalumoxane by the controlled hydrolysis of AlMe 3 in the presence of pyridine. The AlMe 3 (pyr) hydrolysis by 0.5 and 1 equiv. of H 2 O has been followed with real-time 1 H NMR. Based on high-level quantum-chemical calculations, we conclude that hypervalent, pentacoordinate aluminium species are critical in the first steps of hydrolysis.
Databáze: MEDLINE
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