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Primary Amines as Nucleation Centres for Gold Clustering, and the Structural Chemistry of Polygold Ammonium Cations

DOI: 10.1039/DT9950000559

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 559 - 564 (1995)

Update date:2022-08-02

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Authors:

Angermaier, KlausAngermaier, Klaus

Schmidbaur, HubertSchmidbaur, Hubert

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Article abstract of DOI:10.1039/DT9950000559

Treatment of tert-butylamine and benzylamine with BF4 led to the monoauration products <(R'3P)AuNH2R>(+)BF4(-) (R' = Me, R = t-Bu 1a; R' = Me, R = CH2Ph 1b; R'3 = Ph2Me, R = t-Bu 1c).The salts <3NR>(+)BF4(-) (R' = Me, R = t-Bu 2a or CH2Ph 2b) derived from the same amines were obtained using the corresponding oxonium salt <3O>(+)BF4(-).A diauration product <2NH(CH2Ph)>(+)BF4(-) 3 was generated upon slow hydrolytic degradation of 2b in solution.Treatment of NH(SiMe3)2 with <3O(+)BF4(-) afforded both the tris- and tetra-aurated ammonium salts, <3NSiMe3>(+)BF4(-) 2c and <4N>(+)BF4(-) 4, depending on the reaction conditions.The cation of 2c is one of the very rare examples of silylammonium species.Compound 4 was also obtained from the oxonium salt and ammonia.All compounds have been characterized through analytical and spectroscopic data.The crystal structures of 1a, 1c and 3 have been determined by X-ray diffraction methods: 1c is a salt with monomeric gold ammonium cations, but 1a and 3 show supramolecular aggregation of the cations into dimers with short intercationic Au...Au contacts.

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Product name:(tert-butylamine)(methyldiphenylphosphine)gold(I) tetrafluoroborate

Cas No:161959-36-0

161959-36-0

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