Zur Reaktion von Ni8-Clustern mit Natriumamalgam. Die Kristallstrukturen von {[Ni8Hg(PPh)6(PPh3)4]·[Ni8(PPh)6(PPh3)4]} und [Ni8S6(PPh3)8] / Reaction of Ni8-Clusters with Sodium Amalgam. The Crystal Structures of {[Ni8Hg(PPh)6(PPh3)4] · [Ni8(PPh)6(PPh3)4]} and [Ni8S6(PPh3)8]

Abstract

[Ni8Cl4(μ4-PPh)6(PPh3)4] (1) reacts with sodium amalgam to form [Ni9(PPh)6(PPh3)4] (2) and {[Ni8Hg(PPh)6(PPh3)4] · [Ni8(PPh)6(PPh3)4]} (3). 3 has been characterized by X-ray crystal structure analysis. It contains two distorted cubic Ni8-clusters. All faces of the cubes are occupied by μ4-PPh ligands. At one of the cubes one nickel atom is bonded to an external mercury atom. [Ni8Cl2S6(PPh3)6] (4) reacts with sodium amalgam to form [Ni8S6(PPh3)8] (5). In this symmetrical structure all nickel atoms are bonded to three S ligands and to one PPh3.