Get access

Homogeneous Photocatalytic Reactions with Organometallic and Coordination Compounds—Perspectives for Sustainable Chemistry

Authors

  • Dr. Norbert Hoffmann

    Corresponding author
    1. CNRS, Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (UMR 6229), Equipe de Photochimie, UFR Sciences, B.P. 1039, 51687 Reims (France), Fax: (+33) (0)3-26-91-3166
    • CNRS, Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (UMR 6229), Equipe de Photochimie, UFR Sciences, B.P. 1039, 51687 Reims (France), Fax: (+33) (0)3-26-91-3166
    Search for more papers by this author

Abstract

Since the time of Giacomo Ciamician at the beginning of the 20th century, photochemical transformations have been recognized as contributing to sustainable chemistry. Electronic excitation significantly changes the reactivity of chemical compounds. Thus, the application of activation reagents is frequently avoided and transformations can be performed under mild conditions. Catalysis plays a central role in sustainable chemistry. Stoichiometric amounts of activation reagents are often avoided. This fact and the milder catalytic reaction conditions diminish the formation of byproducts. In the case of homogeneous catalysis, organometallic compounds are often applied. The combination of both techniques develops synergistic effects in the sense of “Green Chemistry”. Herein, metal carbonyl-mediated reactions are reported. These transformations are of considerable interest for the synthesis of complex polyfunctionalized compounds. Copper(I)-catalyzed [2+2] photocycloaddition gives access to a large variety of cyclobutane derivatives. Currently, a large number of publications deal with photochemical electron-transfer-induced reactions with organometallic and coordination compounds, particularly with ruthenium complexes. Several photochemically induced oxidations can easily be performed with air or molecular oxygen when they are catalyzed with organometallic complexes. Photochemical reaction conditions also play a certain role in C[BOND]H activation with organometallic catalysts, for instance, with alkanes, although such transformations are conveniently performed with a variety of other photochemical reactions.

Ancillary