Tetraruthenium clusters

Tetraruthenium cluster complexes have been synthesized by the reaction of [ Ru(Cl)(P(OMe)3)2 2(/t-Cl)2(/t-S2)] with Mg, Na, or Na amalgam (Scheme 67). The removal of the terminal chlorine atoms from... 

Carbon functional groups, attachment to polysilanes, 3, 585 Carbon-heteroatom bond formation via antimony(III) compounds, 9, 428 via antimony(V) compounds, 9, 432 via bismuth(III) compounds characteristics, 9, 440 with copper catalysts, 9, 442 non-catalyzed reactions, 9, 443 with bismuth(V) compounds, 9, 450 with bismuthonium salts, 9, 449 with bismuth ylides, 9, 450 Carbon-heteroatom ligands in tetraosmium clusters, 6, 967 in tetraruthenium clusters, 6, 960... 

The vacuum pyrolysis of [Ru3(CO)12] with PhSeSePh at 185°C affords the tetraruthenium cluster [Ru4(CO)n(/i,4-Se)2] (86) (Fig. 28) as the only isolable product.75 By contrast, the reaction of [Os3(CO)10(NCMe)2] with PhSeSePh under mild conditions produces [Os3(SePh)2(CO),0] (87). Apparently, only the Se-Se bond of PhSeSePh is cleaved in this process.7677 In the reaction with the kinetically more labile [Ru3(CO),2] (compared with [Os3(CO)i2]) and with the use of more-forcing pyrolysis conditions, the Se-Se and Se-C bonds rupture and fragmentation of the carbonyl cluster takes place. Isolation of 86 as the major component suggests that this may... 

Figure 15 The antipolio tetraruthenium cluster [H4Ru4( ) -C6H6)4] + 31 and a vanadocene spermicide/anti-HIV compound 32.

Fig.4 Organometallic compounds with antiviral properties a a vanadocene spermi-cides/antiHIV compound b the tetraruthenium cluster [H4Ru4(ri -C6H6)4 ...

Reactions between Ru3(GO)i2 and l,8-bis(diphenylphosphino)naphthalene (dppn) produce the triruthenium cluster complex Ru3(/i-H) /i3-PPh2(nap)PPh(G6H4) (GO)8 as well as several tetraruthenium clusters. " l,8-Bis(diphenylphosphino)naphthalene also reacts with Os3(GO)i2 to produce Os3(/x-H)2 /x-PPh2(nap)-PPh(C6H4) 2(CO)6 and Os3(M-H) //3-PPh2(nap)PPh(C6H4) (CO)8. ... 

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