1,1,1,1 -Tetrakis[triorganylphosphineaurio(I)]ethanium(+) Tetrafluoroborates - Hypercoordinated Species Containing [H3C—C(AuL)4]+ Cations

Oliver Steigeimann 1 , Peter Bissinger 1  and Hubert Schmidbaur 1
  • 1 Anorganisch-chemisches Institut der Technischen Universität München, Lichtenbergstraße 4, D-W-8046 Garching

Hypercoordinate, tetraaurated carbon-complexes of the type [H3C--C (AuPR3)4]+BF4-, R = Ph (1), R = C6H11 (2), (PR3)2 = 1,2-C6H4(CH2CH2PPh2)2 (3) have been prepared by the reaction of the appropriate (phosphane)gold(I) chlorides with 1,1,1-tris(dimethoxyboryl)ethane H3C -C [B(OMe)2]3 in the presence of CsF. The products have been characterized by standard analytical and spectroscopic methods, including single crystal X-ray analyses of 1 and 2. In each case the pentacoordinated carbon atoms have been located at the centre of a square pyramide built up by a methyl group at the apex and four gold atoms forming the base with short Au ··· Au distances of about 2.85 Å, which strongly contribute to the formation and stability of these species.

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Zeitschrift für Naturforschung B is an international scientific journal which publishes original papers, microreviews, and letters from all areas of inorganic chemistry, solid state chemistry, coordination chemistry, molecular chemistry, and organic chemistry.