om020054c_si_001.pdf (1.02 MB)
Download fileIn Search of the Elusive Open-Faced Triangulo Nickel Cluster: Insertion of Thallium(I) into a μ3-I Capping Ligand
journal contribution
posted on 06.08.2002, 00:00 authored by Marc J. A. Johnson, Peter K. Gantzel, Clifford P. KubiakThallium(I) inserts into the Ni−I bonds on
one face of the 52e triangulo cluster [Ni3(μ3-I)2(μ-dppm)3]
to form the new electron-deficient cluster cation [Ni3(μ3-TlI)(μ3-I)(μ-dppm)3]+. A single-crystal X-ray diffraction
study revealed a triangulo cluster containing a symmetrically face-capping TlI ligand and having average
Ni−Ni, Ni−Tl, and Ni−I distances of 2.509(14), 2.580(16), and 2.624(14) Å, respectively. Thallium ion can be
removed from this cationic cluster by various reagents
to regenerate the starting cluster but will not eliminate
as TlI and yield an open-faced cluster.