Triosmium Clusters with Introduced Transition Metal Atoms

TRIOSMIUM CLUSTERS WITH INTRODUCED TRANSITION METAL ATOMS 

The metal terminal ligand systems have been prepared in various ways. Three main methods are briefly described here. 

This route has been applied to oxidative addition of the mononuclear species ReH(CO)s or OsH2(CO)4 to Os3(CO)n(MeCN) or to Os3(CO)10L2 (L = MeCN or cyclooctene). The compounds Os3H(CO)11 Re(CO)5 449) 

An alternative route to Os3Re clusters is to add [Re(CO)s] and H+ successively to Os3(CO)I2, rather than by oxidative addition of ReH(CO)5 (453), but a wider range of compounds in lower yield was obtained Os3H(CO)u Re(CO)5 but also Os3ReH(CO)15 (86) and Os3ReH3(CO),3 

There is only one clear example of the reaction of Os3H2(CO)10 with an unsaturated ligand leading to a terminal metal group. The vinylidene 

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