The unexpected formal insertion of a carbonyl group into a heterocyclic N-Ir bond

Reaction of the dioxygen complex [Ir(C7H4NS2)(O2)(CO)(PPh3)2] (C7H4NS2 benzothiazole-2-thiolate) with SO2 produces the unprecedented incorporation of the carbonyl group into the benzothiazole-2-thiolate ligand through the heterocyclic nitrogen, in addition to the oxidation to sulfate, yielding [)SC6H4(SO4)-(PPh3)2]. bl]We thank the Direction General de Investigation Cientifica y Tecnica (DGICYT) (GRANT PB88-0056) and Consiglio Nazionale delle Ricerche (Rome) for financial support.Peer reviewe