Poly[(tri-tbutyl-phosphine)gold(I)]ammonium Tetrafluoroborates and Bis(tri-tbutyl-phosphine)gold(I) Tetrafluoroborate
Open Access
- 1 June 1995
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 50 (6) , 859-863
- https://doi.org/10.1515/znb-1995-0602
Abstract
The reaction of tris[(tri-tbutyl-phosphine)gold(I)]oxonium tetrafluoroborate with close to stoichiometric quantities of ammonia in dichloromethane at -78 °C affords tetrakis[(tri- tbutyl-phosphine)gold(I)]ammonium tetrafluoroborate, the structure of which has been determined by single crystal X-ray diffraction. The cation features a strongly distorted NAu4 tetrahedron with four short and two longer Au -Au edges. - With a large excess of ammonia, only partially aurated ammonium salts are formed, as suggested by detailed NMR spectroscopic and mass spectrometric studies. These partially aurated intermediates have not been isolated. Slow decomposition processes in these solutions lead to the precipitation of bis(tri- tbutyl-phosphine)gold(I) tetrafluoroborate. The structure of the bis(chloroform) solvate has also been determined. The crystals contain two independent C3-symmetrical cations with similar structures.Keywords
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