English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/156018
Share/Impact:
Statistics
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Anionic derivatives of perfluorinated trimethylgold: synthesis and decomposition

AuthorsPérez-Bitrián, Alberto; Baya, Miguel ; Casas, José M. ; Menjón, Babil ; Orduna, Jesús
KeywordsMetal alkyls
Organogold compounds
Highly electrophilic metal fragments
Trifluoromethyl compounds
Photoinitiated oxidative addition
Issue Date2016
Citation6th EuCheMS (2016)
AbstractThe study of fundamental processes involving organogold complexes is a topic of much current interest. In this context, the properties of trimethylgold, (CH3)3Au, and its derivatives have been widely studied as the most basic representatives of triorganogold compounds —with especial attention being focused on their decomposition mechanisms. Little is known, however, on the chemistry of the perfluorinated homologue (CF3)3Au, which is probably due to the lack of suitable experimental procedures to arrive at this kind of compounds. Given the sharply different properties of the CH3 and CF3 groups, we undertook a theoretical study of the perfluorinated (CF3)3Au fragment in order to establish its analogies and especially its differences with the well-known (CH3)3Au moiety. At the experimental level, convenient synthetic methods have been devised to prepare the series of anionic [PPh4][(CF3)3AuX] derivatives with all non-radioactive halide ligands: X = F, Cl, Br, I. Additionally, the cyano complex [PPh4][(CF3)3AuCN] was also synthesized. All these anionic compounds exhibit remarkable thermal stability -the latter decomposing at 351°C. The decomposition of these anionic compounds has been studied both in the gas phase and in the solid state. In the gas phase, where only unimolecular processes occur, the primary decomposition pathways given in the Scheme are operative. Aside from the organogold fluoride derivative [(CF3)3AuF]− for which CF2 extrusion is preferred, CF3–CF3 elimination is the most favored path in all cases. Interestingly, this high-energy decomposition pathway is completely absent in the condensed phase, where lower-energy intermolecular avenues are open. Transfer of CF3 groups between gold centers as well as trifluoromethylation of the phenyl rings in the cation are observed. [Scheme]: Primary intramolecular decomposition pathways observed by tandem mass spectrometry on the anionic species [(CF3)3AuX]− (X = F, Cl, Br, I, CN).
DescriptionResumen del trabajo presentado al 6th EuCheMS Chemistry Congress, celebrado en Sevilla (España) del 11 al 15 de septiembre de 2016.
URIhttp://hdl.handle.net/10261/156018
Appears in Collections:(ICMA) Comunicaciones congresos
(ISQCH) Comunicaciones congresos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.