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Isolable Three‐Coordinate Base‐Stabilized Alumylene: A Precursor of Persistent Acceptor‐Free Monomeric Aluminum Oxide
Author(s) -
Baeza José Miguel León,
Xu Huihui,
Takahashi Shintaro,
Baceiredo Antoine,
Guerrero Rene Segundo Rojas,
Hashizume Daisuke,
SaffonMerceron Nathalie,
Branchadell Vicenç,
Kato Tsuyoshi
Publication year - 2025
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202505181
Subject(s) - monomer , base (topology) , chemistry , acceptor , aluminium , oxide , polymer chemistry , organic chemistry , polymer , physics , mathematical analysis , mathematics , condensed matter physics
Abstract An isolable monomeric alumylene 2 stabilized by two donating ligands (phosphine and NHC) has been synthesized. Experimental and theoretical analysis confirm that the NHC ligand in 2 is labile and reversibly dissociates from the Al I center above −20 °C. Of particular interest, despite being thermodynamically stabilized by two donor ligands, alumylene complex 2 exhibits a high reactivity with a considerably higher nucleophilicity compared to the monophosphine‐ligated complex 5 . It is interesting to note that 2 reacts immediately with N 2 O at −90 °C, allowing the synthesis of bis‐ligated aluminum oxide 15 , which is stable up to −70 °C.
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