Reactions of Co4(CO)12 and Cr(CO)6 with dibenzothiophene and benzothiophene

Reaction of Co-4(CO)(12) With dibenzothiophene (DBT) gives (eta(6)-DBT)Co-4(CO)(9) (1), in which one arene ring of DBT is eta(6)-coordinated to a Co. This cluster 1 reacts with Cr(CO)(6) to give (eta(6)-DBT)Cr(CO)(3) and [CO)(3)Cr](2)(mu-DBT) but reacts with Cr(CO)(3)(NCMe)(3) to give the desulfurized (eta(6)-benzene)Co-4(CO)(9) (4). Benzothiophene yields the same desulfurized product 4 upon reaction with Co-4(CO)(12).