FURTHER GOLD AGGREGATION AT A PENTANUCLEAR GOLD CLUSTER WITH HYPERCOORDINATE INTERSTITIAL NITROGEN

Reaction of hexamethyldisilazane with chloro(trimethylphosphine)gold(I) and tris-[(trimethylphosphine)gold(I)]oxonium tetrafluoroborate gives a heptanuclear gold complex in which a dicationic, nitrogen-centered, trigonal-bipyramidal gold cluster is associated with 2 equiv of Me(3)PAuCl through short Au-Au contacts to the equatorial gold atoms. [GRAPHICS] ped by a Cp '' Co unit and a [(Cp '' Co)(2) mu-CO)] dimer coordinates to only three P atoms from below, resulting in a kite-like distortion of the P-4 molecule with two short and two long P-P distances. The longer distances could be considered to be on the borderline between a bonding P-P length and the van der Waals contact. The factors controlling the structure have been studied by EHT calculations.