Reactions of Co{sub 4}(CO){sub 12} and Cr(CO){sub 6} with dibenzothiophene and benzothiophene

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