Hydrolytic Decomposition of Tetramethylammonium Bis(trifluoromethyl)aurate(I), [NMe₄][Au(CF₃)₂]: A Route for the Synthesis of Gold Nanoparticles in Aqueous Medium

Abstract

Monodisperse gold nanoparticles (AuNPs) were obtained by hydrolytic decomposition of a new molecular precursor, tetramethylammonium bis(trifluoromethyl)aurate(I), [NMe4][Au(CF3)2], which has been characterised by spectroscopic and single‐crystal X‐ray diffraction analyses. On account of the simple and high‐yield synthesis, the title compound represents a versatile synthon and an alternative to the commonly used chloroauric acid (HAuCl4).

[Au(CF3)(CO)]: A Gold Carbonyl Compound Stabilized by a Trifluoromethyl Group

“…[5] The performances achieved, however, seem to be highly dependent on the size, shape, and morphology of these Au NPs, [6] and thus new efficient and reliable methods to prepare them are being eagerly sought. [7] A recently reported procedure [8] to obtain monodisperse Au NPs with circa 28.7 nm average size consists of hydrolysis of the homoleptic trifluoromethyl derivative [Au(CF 3 ) 2 ]…”

“…This labeling experiment enables the CO signal to be unambiguously located in the 13 This extreme water sensitivity is the reason why compound 2 is indeed a short-lived intermediate under the wet conditions required to produce the hydrolysis of [Au(CF 3 ) 2 ] À . [8] Under strictly anhydrous conditions, however, compound 2 can be isolated as light yellow crystals. [11] The n(CO) frequency observed in the solid state (2194 cm À1 ) is similar to that found in [Au(OSO 2 F)(CO)] (2195 cm À1 ), [19] but is still significantly lower than that reported for the cationic species [Au(CO) 2 ]-[Sb 2 F 11 ] (2254 cm À1 ).…”

Silver Compounds in Synthetic Chemistry. Part 8. Complexes of Perfluoroorgano Silver(I) Derivatives with 4‐Dimethylaminopyridine (DMAP)

“…Whereas 2-may be understood on basis of parallel experiments [27][28][29] followed by reactions of the intermediately formed HF with the walls of the borosilicate glass vessels [Equation (2)], evolution of elemental hydrogen in a similar mechanism as formulated for the intensively investigated hydrolysis of trifluoromethyl gold derivatives [27] has to be taken into account.…”

A General Route to Perfluoroalkyl‐ and Trifluorovinyl‐Substituted Fischer Carbene Complexes of Tungsten and Chromium – Syntheses, Characterisation and Structures

“…[6] Our main activity in recent years has been focused on reactions of perfluoroorgano-silanes in the presence of fluoride sources to generate equivalents of perfluoroorgano anions. As a result of this approach, we were able not only to open access to numerous perfluoroalkyl elementates [7] but, in the course of perfluoroalkylation of organic substrates containing multiple bonds (C=C, C=O, C=S and C=N), we were able to obtain stable salts of fluorinated organic anions which were valuable synthons in further and previously impossible transformations. [8][9][10][11][12][13][14] Herein, we report a new and convenient synthetic method for preparing the first perfluoroalkyl (CF 3 , C 2 F 5 ) and trifluorovinyl-containing Fischer carbene complexes on the basis of reactions of tungsten and chromium hexacarbonyls with perfluoroalkyl and trifluorovinylsilanes in the presence of stoichiometric amounts of fluoride ions.…”