Photochemical reactions of fac-rhenium(I) tricarbonyl complexes and their application for synthesis

• Photochemical ligand substitution (PLS) reactions of Re(I) tricarbonyl complexes are reviewed.
• Photochemical isomerization of the Re(I) tricarbonyl complex is reviewed.
• Mechanisms of these photochemical reactions are summarized.
• Details of higher excited states of Re complexes could be described.
• Linear- and ring-shaped Re(I) multinuclear complexes can be synthesized by using the PLS reactions.

The photochemical ligand substitution and isomerization reactions of fac-[ReI(L-L′)(CO)3(L″)]n+-type complexes are reviewed. We especially focus on the mechanistic studies of the these reactions for affording deeper insights into energetically higher excited states of Re(I) complexes, other than the lowest 3MLCT excited state. Moreover, application of the photochemical reactions for synthesis of the linear-shaped and ring-shaped Re(I) multinuclear complexes is described.

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