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Tetranuclear complexes, photochemistry

Although in a few tetranuclear complexes fragmentation is the primary result of photolysis , and others, e.g., (h -CjHp Fe fCO), are inert with respect to both photoinduced M—M cleavage and carbonyl loss , substitution without fragmentation is the dominant photoreaction of tetranuclear metal carbonyls, especially of those containing second and third-row metals. Both Ir (CO),2 and H Os (CO),2 " lead to tetranuclear olefin-substituted products when irradiated with alkenes, both with some rearrangement of the Ir moiety in the former case, and a hydride abstraction in the latter. Irradiation of H Ru/CO),j in the presence of P(OMe)j or PPhj leads to stepwise formation of the substituted clusters H Ru/CO), (n = 1-4) with low quantum efficiency . Carbonyl substitution also dominates the photochemistry of HjM CCO) (M = Ru, FeRuj, FeOsj) . [Pg.300]


See other pages where Tetranuclear complexes, photochemistry is mentioned: [Pg.104]    [Pg.107]    [Pg.322]    [Pg.178]    [Pg.115]    [Pg.149]    [Pg.427]    [Pg.219]    [Pg.761]    [Pg.153]    [Pg.427]   
See also in sourсe #XX -- [ Pg.104 , Pg.105 , Pg.106 , Pg.107 ]




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