In the presence of NH4PF6, reaction of [(η5 C5Me5)WS3Cu3Br(dppm)] with excess pyridine afforded red prismatic crystals, [(η5 C5Me5)WS3Cu3Br(Py)3(dppm)](PF6) (1). It was characterized by elemental analysis, IR, UV vis and1H NMR spectroscopy and X ray diffraction. 1 crystallizes in an orthorhombic system with space group Pna21 and unit cell parameters a=2.1124(4)nm, b=1.8944(4)nm, c=1.3338(2)nm, V=5.3375(19)nm3, Z=4, Dc=1.807g·cm-3, Mr=1452.42, F(000)=2864, μ=4.342mm-1, R1=0.0487, wR2=0.1027. The structure of the cluster cation contains an incomplete cubane like WS3Cu3 core where Cu(1) and Cu(2) atoms are bridged by a dppm ligand. Each of the three Cu atoms adopts a distorted tetrahedral coordination geometry. The W Cu(1), W Cu(2) and W Cu(3) distances are 0.27698(17)nm, 0.2772(17)nm, and 0.27065(9)nm, respectively. CCDC: 199845.
