Photochemistry and Photophysics of Chromium III Complexes

The [Cr(bipy)3] cation is an important model compound in the photochemistry and photophysics of Cr(III) systems. Consequently the solid-state structure is of considerable interest. An error in the space group previously reported for [Cr(bipy)3](PE6)3 has now been corrected, but the singlecrystal X-ray structural analysis of the perchlorate salt reveals that frequently used 

The production of Cr(VI) as a byproduct in the 254 nm photolysis of Cr(III) ammine complexes has been studied in detail. In HCl or HCIO4,02 is necessary 

The recent ACS publication Excited States and Reactive Intermediates contains three chapters on this topic. Until recently, photochemists had generally interpreted the substitution reactions of excited states of Cr(III) complexes in terms of dissociative mechanisms, but as a result of pressure dependence studies and the extensive data on the photoinduced water exchange in the 18 possible [Cr(NH3)jc(OH2)6-x] ions, more consideration is being given to 

Other photochemical reactions have been discussed in Section 6.2.3, and mention in this section should also be made of the detailed low-temperature. 

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Two useful reviews have appeared. One general review deals with the photochemistry and photophysics of chromium(III)/ and the second specifically with the advances in the photochemistry and photophysics of polypyridyl complexes of chromium(III). ... 

The special issue of Photochemistry and Photophysics of Coordination Compounds contains two reviews pertinent to Cr(III) systems and another general review coordination compound photochemistry is available. There is also a detailed review of the photophysics of chromium(III) complexes containing an extensive compilation of excited-state relaxation rates. 

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