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Reversible CO 2 Addition to a Si=O Bond and Synthesis of a Persistent SiO 2 –CO 2 Cycloadduct Stabilized by a Lewis Donor–Acceptor Ligand
Author(s) -
Rodriguez Ricardo,
AlvaradoBeltran Isabel,
Saouli Jérémy,
SaffonMerceron Nathalie,
Baceiredo Antoine,
Branchadell Vicenç,
Kato Tsuyoshi
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201709787
Subject(s) - chemistry , photodissociation , dimer , cycloaddition , ligand (biochemistry) , acceptor , lewis acids and bases , derivative (finance) , photochemistry , carbonate , catalysis , organic chemistry , biochemistry , physics , receptor , financial economics , economics , condensed matter physics
The donor‐stabilized sila‐β‐lactone 1 reacts with CO 2 via a remarkable reversible [2+2]‐cycloaddition reaction to form the spiro‐cyclic silicon carbonate derivative 2 . Furthermore, photolysis of 2 under pressure of CO 2 affords the first persistent SiO 2 –CO 2 cycloadduct 3 , presenting a Si 2 O 4 ‐like structure, which is stabilized by a Lewis donor–acceptor type ligand. As predicted by theoretical calculations, in marked contrast to the thermodynamically stable SiO 2 dimer, the SiO 2 –CO 2 mixed cycloadduct 3 is labile and readily releases CO 2 .