Transition metals triosmium clusters

TRIOSMIUM CLUSTERS WITH INTRODUCED TRANSITION METAL ATOMS... 

Clusters based on homonuclear trimetal units are dominated by those containing transition metals from the iron triad. Clusters constructed on a Co3 framework are the only additional examples in this section. The first cluster to be reported was Co3(CO)9BNEt3 (22). This arises from the reaction of [Co(CO)4] with BBr3 in the presence of NEt3 and is clearly related to the triosmium systems of Shore et al. discussed above (Fig. 7)... 

Transition metal complexes of other relevant organonitrogen compounds such as isoquinoline, 5,6-benzoquinoline, 7,8-benzoquinoline, acridine, and phenanthridine are also known, and they contain theN-ligand coordinated in either the p fN) or the tl -arene fashion [49, 69, 70]. The triosmium cluster Os3(CO),o(CH3CN)2 reacts with polyaromatic N-heterocycles such as 5,6-benzoquinoline and phenanthridine in an analogous manner to Py and Q, yielding J.3, n (N,C,C) complexes [69]. 

---