SYNTHESES AND X-RAY STRUCTURES OF MIXED BENZENETHIOLATO-SULFIDO AND BENZENETHIOLATO-SELENIDO TRINUCLEAR NICKEL CLUSTERS

The reaction between NiCl2, NaSPh and NaEH (E = S, Se) in a mixture of acetonitrile and acetone gave trinuclear clusters [Ni-3(mu(3)-E)(mu-S Ph)(3)(SPh)(3)](2-) (E = S, Se) and the previously characterized monon uclear complex [Ni(SPh)(4)](2-). The X-ray structures of the trinuclea r clusters are similar to each other except for the Ni(3)E (E = S, Se) sections, and the Ni-E (E = S, E = S, Se) frameworks of the clusters are described in terms of three planar NiS4 or NiS3Se coordination pla nes which are condensed via adjacent edges to form cyclic systems with a triply bridging sulfide or selenido ion in the centre. Copyright (C ) 1996 Elsevier Science Ltd