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Structural Evidence for Pnictogen-Centered Lewis Acidity in Cationic Platinum-Stibine Complexes Featuring Pendent Amino or Ammonium Groups †

As part of our continuing interest in the chemistry of cationic antimony Lewis acids as ligands for late transition metals, we have now investigated the synthesis of platinum complexes featuring a triarylstibine ligand substituted by an o-[(dimethylamino)methyl]phenyl group referred to as Ar(N). Mor...

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Autores principales: Rodrigues, Roberta R., Gabbaï, François P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8036533/
https://www.ncbi.nlm.nih.gov/pubmed/33915809
http://dx.doi.org/10.3390/molecules26071985
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author Rodrigues, Roberta R.
Gabbaï, François P.
author_facet Rodrigues, Roberta R.
Gabbaï, François P.
author_sort Rodrigues, Roberta R.
collection PubMed
description As part of our continuing interest in the chemistry of cationic antimony Lewis acids as ligands for late transition metals, we have now investigated the synthesis of platinum complexes featuring a triarylstibine ligand substituted by an o-[(dimethylamino)methyl]phenyl group referred to as Ar(N). More specifically, we describe the synthesis of the amino stibine ligand Ph(2)SbAr(N) (L) and its platinum dichloride complex [LPtCl]Cl which exists as a chloride salt and which shows weak coordination of the amino group to the antimony center. We also report the conversion of [LPtCl]Cl into a tricationic complex [LHPt(SMe(2))](3+) which has been isolated as a tris-triflate salt after reaction of [LPtCl]Cl with SMe(2), HOTf and AgOTf. Finally, we show that [LHPt(SMe(2))][OTf](3) acts as a catalyst for the cyclization of 2-allyl-2-(2-propynyl)malonate.
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spelling pubmed-80365332021-04-12 Structural Evidence for Pnictogen-Centered Lewis Acidity in Cationic Platinum-Stibine Complexes Featuring Pendent Amino or Ammonium Groups † Rodrigues, Roberta R. Gabbaï, François P. Molecules Article As part of our continuing interest in the chemistry of cationic antimony Lewis acids as ligands for late transition metals, we have now investigated the synthesis of platinum complexes featuring a triarylstibine ligand substituted by an o-[(dimethylamino)methyl]phenyl group referred to as Ar(N). More specifically, we describe the synthesis of the amino stibine ligand Ph(2)SbAr(N) (L) and its platinum dichloride complex [LPtCl]Cl which exists as a chloride salt and which shows weak coordination of the amino group to the antimony center. We also report the conversion of [LPtCl]Cl into a tricationic complex [LHPt(SMe(2))](3+) which has been isolated as a tris-triflate salt after reaction of [LPtCl]Cl with SMe(2), HOTf and AgOTf. Finally, we show that [LHPt(SMe(2))][OTf](3) acts as a catalyst for the cyclization of 2-allyl-2-(2-propynyl)malonate. MDPI 2021-04-01 /pmc/articles/PMC8036533/ /pubmed/33915809 http://dx.doi.org/10.3390/molecules26071985 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rodrigues, Roberta R.
Gabbaï, François P.
Structural Evidence for Pnictogen-Centered Lewis Acidity in Cationic Platinum-Stibine Complexes Featuring Pendent Amino or Ammonium Groups †
title Structural Evidence for Pnictogen-Centered Lewis Acidity in Cationic Platinum-Stibine Complexes Featuring Pendent Amino or Ammonium Groups †
title_full Structural Evidence for Pnictogen-Centered Lewis Acidity in Cationic Platinum-Stibine Complexes Featuring Pendent Amino or Ammonium Groups †
title_fullStr Structural Evidence for Pnictogen-Centered Lewis Acidity in Cationic Platinum-Stibine Complexes Featuring Pendent Amino or Ammonium Groups †
title_full_unstemmed Structural Evidence for Pnictogen-Centered Lewis Acidity in Cationic Platinum-Stibine Complexes Featuring Pendent Amino or Ammonium Groups †
title_short Structural Evidence for Pnictogen-Centered Lewis Acidity in Cationic Platinum-Stibine Complexes Featuring Pendent Amino or Ammonium Groups †
title_sort structural evidence for pnictogen-centered lewis acidity in cationic platinum-stibine complexes featuring pendent amino or ammonium groups †
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8036533/
https://www.ncbi.nlm.nih.gov/pubmed/33915809
http://dx.doi.org/10.3390/molecules26071985
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