PREPARATION OF TETRABUTYLAMMONIUM LUOROMETHANESULFONATO)OCTAHEDRO-HEXAMOLYBDATE(2-), (BU4N)(2)[MO6BR8I(CF3SO3)(6)(A)] AND OTHER DERIVATIVESCONTAINING THE MO6BR84+ CORE

The compound (Bu4N)(2)[Mo6Br8i(CF3SO3)(6)(a)] (2), is prepared by the reaction of (Bu4N)(2)[Mo6Br8i(Br)(6)(a)] (1) and AgCF3SO3 in CH2Cl2. T he triflate ligands, CF3SO3-, in compound 2 are readily substituted by other ligands, and convenient routes are reported for the preparation of the clusters [Mo6Br8i(X)(6)(a)](2-) where X = CF3CO2, SCN, NCO, Cl , Br and I. The preparation of the cationic cluster, [Mo6Br8i(Ph3PO)(6 )(a)](4+), is also reported. The clusters were characterized by IR, UV -Vis, fluorescence and FAB mass spectrometry. (C) 1998 Elsevier Scienc e S.A. All rights reserved.