Ligand-metal change transfer

However, the absorption bands irradiated correspond to ligand-metal change-transfer (LMCTT) excitation. Photolysis of the quadruply metal-metal bonded dimer, (RcjClg) in CHjCN forms monomers ... 

The electronic spectra of these materials recorded in chloroform solution appear to be dominated by intense bands originating from internal ligand transitions, metal-ligand and ligand-metal charge-transfer bands, whose intensities change markedly with changes in the population of the two spin states [7]. 

Photoaquation as the result of ligand to metal change-transfer (LMCT) excitation also occurs with quantum yields 1 but is suppressed by oxidants in solution . A chain mechanism involving the (PtCljp intermediate accounts for this behavior ... 

With some transition-metal complexes, the ligand is not only an ancillary ligand. Similar to the transition-metal, it takes directly part in the hydrogen transfer process. Such ligand-metal bifunctional hydrogenation catalysis is dramatically changing the face of reduction chemistry (Scheme 9) (for reviews of ligand-metal bifunctional catalysis, see [32, 37 0]). 

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