CHARACTERISTICS STRUCTURAL FEATURES OF CYCLOPENTADIENYL GERIVATIVES OF POST-TRANSITION METALS. II. SYNTHESIS AND STRUCTURE OF TRIS(TRIPHENYLPHOSPHINEGOLD)TETRAPHENYLCYCLOPENTADIENE TETRAFLUOROBORATE

Article abstract of DOI:10.1016/S0022-328X(00)88380-1

The trinuclear cationic complex ^+- (I) obtained by interaction of C5HPh4AuPPh3 or Ph4C5(AuPPh3)2 with ^+- in THF was studied by X-ray diffraction.In the presence of benzene, triclinic crystals of the solvate ^+- * 2C6H6 are formed, a=12.845(6), b=16.042(8), c=22.642(11) Angstroem, α=86.62(4), β=77.51(4), γ=76.05(4) deg, space group P<*>, Z=2, 9494 reflections with I > 2? (λ(Mo-K_α), θ/2θ scan, 2θ <*> 46 deg), with absorption correction R=0.054.The complex represents a diaurated cation of tetraphenylcyclopentadienyl(triphenylphosphine)gold, containing a triangular Au2C fragment (Au-Au 2.820(1) Angstroem) which is bonded to the third Au atom (Au-Au 3.021(1) Angstroem), coordinated to the cyclopentadienyl ligand by a bond intermediate between η¹(?) and η³ (Au-C 2.21(2), 2.60(2) and 2.71(2) Angstroem).