Benzene cyclopentadienyl ruthenium complex

Benzene cyclopentadienyl ruthenium(II) complex 125 undergoes nucleophilic addition at the arene ligand via the addition of sodium borohy-dride or phenyllithium. Reaction with phenyllithium gives the exo-phenyl cyclohexadienyl derivative 249 in 89% yield (154) [Eq. (32)]. 

Photolysis of complex 125 (arene = benzene) in acetonitrile gives a quantitative yield of cyclopentadienyl tris(acetonitrile) ruthenium complex... 

Although benezene and benzene type complexes are much less common than those with cyclopentadienyl ligands, a number of such complexes are known for chromium and ruthenium. The bis benzene complex (// -C6H6)2Cr is photochemi-... 

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