Collect. Czech. Chem. Commun. 1984, 49, 1492-1496

A [8,8'-μ-I-3-Co(1,2-C2B9H10)2] metallacarborane complex with a iodonium bridge. Evidence for a bromonium analogue

Jaromír Plešek, Bohumil Štíbr and Stanislav Heřmánek

Institute of Inorganic Chemistry Prague, Czechoslovak Academy of Sciences, 250 68 Řež near Prague


The [8,8'-μ-I-3-Co(1,2-C2B9H10)2] complex with a iodonium bridge between both dicarbollide ligands was prepared and its constitution was established by NMR methods. It behaves as a Lewis acid opening its bridge by the action of Lewis bases to form {8-I-8'-L-3-Co(1,2-C2B9H10)2] species. The less stable bromonium analogue was not isolated but its existence was confirmed by the reaction with Lewis bases affording the [8-Br-8'-L-3-Co(1,2-C2B9H10)2]derivatives.