A Cationic Unsaturated Platinum(II) Complex that Promotes the Tautomerization of Acetylene to Vinylidene
Complex [PtMe(PMeAr)] (1), which contains a tethered terphenyl phosphine (Ar =2,6-(2,6-PrCH)CH), reacts with [H(EtO)]BAr (BAr =B[3,5-(CF)CH] ) to give the solvent (S) complex [PtMe(S)(PMeAr)] (2⋅S). Although the solvent molecule is easily displaced by a Lewis base (e.g., CO or CH) to afford the corr...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/75514 |
| Acceso en línea: | https://hdl.handle.net/11441/75514 https://doi.org/10.1002/anie.201700087 |
| Access Level: | acceso abierto |
| Palabra clave: | Phosphane ligands Acid complex Vin ylidenes Platinum DFT |
| Sumario: | Complex [PtMe(PMeAr)] (1), which contains a tethered terphenyl phosphine (Ar =2,6-(2,6-PrCH)CH), reacts with [H(EtO)]BAr (BAr =B[3,5-(CF)CH] ) to give the solvent (S) complex [PtMe(S)(PMeAr)] (2⋅S). Although the solvent molecule is easily displaced by a Lewis base (e.g., CO or CH) to afford the corresponding adducts, treatment of 2⋅S with CH yielded instead the allyl complex [Pt(η-CH)(PMeAr)] (6) via the alkyne intermediate [PtMe(η-CH)(PMeAr )] (5). Deuteration experiments with CD, and kinetic and theoretical investigations demonstrated that the conversion of 5 into 6 involves a Pt-promoted HC≡CH to :C=CH tautomerization in preference over acetylene migratory insertion into the Pt−Me bond. |
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