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 <i>o</i>-[(dimethylamino)methyl]phenyl group referr...
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MDPI AG
2021-04-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/26/7/1985 |
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| author | Roberta R. Rodrigues François P. Gabbaï |
| author_facet | Roberta R. Rodrigues François P. Gabbaï |
| author_sort | Roberta R. Rodrigues |
| collection | DOAJ |
| 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 <i>o</i>-[(dimethylamino)methyl]phenyl group referred to as Ar<sup>N</sup>. More specifically, we describe the synthesis of the amino stibine ligand Ph<sub>2</sub>SbAr<sup>N</sup> (<b>L</b>) and its platinum dichloride complex [<b>L</b>PtCl]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 [<b>L</b>PtCl]Cl into a tricationic complex [<b>L</b>HPt(SMe<sub>2</sub>)]<sup>3+</sup> which has been isolated as a tris-triflate salt after reaction of [<b>L</b>PtCl]Cl with SMe<sub>2</sub>, HOTf and AgOTf. Finally, we show that [<b>L</b>HPt(SMe<sub>2</sub>)][OTf]<sub>3</sub> acts as a catalyst for the cyclization of 2-allyl-2-(2-propynyl)malonate. |
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| format | Article |
| id | doaj.art-62a22020ae814b449bc32184ba5cc078 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T12:42:33Z |
| publishDate | 2021-04-01 |
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| series | Molecules |
| spelling | doaj.art-62a22020ae814b449bc32184ba5cc0782023-11-21T13:43:35ZengMDPI AGMolecules1420-30492021-04-01267198510.3390/molecules26071985Structural Evidence for Pnictogen-Centered Lewis Acidity in Cationic Platinum-Stibine Complexes Featuring Pendent Amino or Ammonium GroupsRoberta R. Rodrigues0François P. Gabbaï1Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USADepartment of Chemistry, Texas A&M University, College Station, TX 77843-3255, USAAs 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 <i>o</i>-[(dimethylamino)methyl]phenyl group referred to as Ar<sup>N</sup>. More specifically, we describe the synthesis of the amino stibine ligand Ph<sub>2</sub>SbAr<sup>N</sup> (<b>L</b>) and its platinum dichloride complex [<b>L</b>PtCl]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 [<b>L</b>PtCl]Cl into a tricationic complex [<b>L</b>HPt(SMe<sub>2</sub>)]<sup>3+</sup> which has been isolated as a tris-triflate salt after reaction of [<b>L</b>PtCl]Cl with SMe<sub>2</sub>, HOTf and AgOTf. Finally, we show that [<b>L</b>HPt(SMe<sub>2</sub>)][OTf]<sub>3</sub> acts as a catalyst for the cyclization of 2-allyl-2-(2-propynyl)malonate.https://www.mdpi.com/1420-3049/26/7/1985pnictogen bondingplatinumcatalysis |
| spellingShingle | Roberta R. Rodrigues François P. Gabbaï Structural Evidence for Pnictogen-Centered Lewis Acidity in Cationic Platinum-Stibine Complexes Featuring Pendent Amino or Ammonium Groups Molecules pnictogen bonding platinum catalysis |
| 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 | pnictogen bonding platinum catalysis |
| url | https://www.mdpi.com/1420-3049/26/7/1985 |
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