166900-16-9Relevant academic research and scientific papers
Silylimido and Disilylamido Groups as Clustering Centers for (Phosphane)gold(I) Units: Aurated Silylammonium Cations
Angermaier, Klaus,Schmidbaur, Hubert
, p. 817 - 822 (2007/10/02)
The reaction of hexamethyldisilazane with tris(phosophane)-aurio(I)>oxonium tetrafluoroborates affords the corresponding trinuclear μ3-trimethylsilylimido compounds of the type 3NSiMe3>(1+) BF4(1-) (1a-f).With (triphenylsilyl)amine and the oxonium reagents the analogous series of Ph3Si derivatives (2a-f) is formed (R = Me, Et, i-Pr; R3 = Ph2Me; R = Ph, o-Tol).The Et3P-based oxonium salt and (Me3Si)2NH give the dinuclear μ-trimethylsilylamido complex 2N(SiMe3)2>(1+)BF4(1-) (3) as the main product.The crystal and molecular structures of complexes 2a, 2e, and 3 were determined.The trinuclear cations have a pseudo-tetrahedral structure with small Au-N-Au angles and short Au-Au distances for the SiNAu3 units.The Ph3SiN units in 2a and 2e are capping triangles of gold atoms, while in the cation of 3 the (Me3Si)2N unit is bridging a pair of gold atoms.In the 31P- and 14N-NMR spectra of compounds 1 and 2 (except for 1f and 2f) the coupling J(31P,14N) is observed.This coupling is temperature-dependent, owing to changes in the relaxation characteristics in solution at low temperature.The decomposition of compounds 1 and 2 leads to the formation of pentanuclear dications 5N>(2+) for R = Me, Ph. - Keywords: μ3-Silylimido-tris cations / μ-Disilylamido-bis cations
