Rhenium mixed-metal carbonyl clusters

Metal carbonyl clusters are also numerous. In addition to dinuclear carbonyls such as M2(CO)io (M = Mn, Tc, Re), many hydrido clusters and ionic species exist which contain three or more metal atoms [M3H3(CO)i2] (M = Mn, Tc, Re), Mn3(CO)i (linear compound, 1)4 ), and Re3(/i-H)(CO)i4 (the Re —Re —Re angle is 90°). Rhenium forms a number of tetranuclear compounds. Some of them have a butterfly structure while others adopt a triangle of rhenium atoms with one Re attached to it Re4(/i3-H)4(CO)i2, [(Re4( -H)4(CO)i3] , [Re4( -H)6(CO)i4], and [Re4(CO)i6]. Rhenium also forms mixed metal carbonyls possessing several metal atoms (Table 3.14). There are numerous clusters of the group 7 metals containing cyclopentadienyl groups, ... 

The bimetalhc rhenium thiolato complex Re2(p-S2NC7H4)2(CO)e has been reacted with trimetallic group 8 carbonyl clusters M3(CO)i2 (M = Fe, Ru) and Os3(CO)io(NCMe) to give the mixed-metal clusters 49-51. Reaction of 50 (M = Os) with PPhs results in mono- and bis-substitution,... 

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