Three types of photochemical reaction of coordination compounds are well-known and have often been discussed : redox reactions, substitutions, and isomerizations. Less well known is a fourth type of reaction, which occurs fairly frequently: reaction of the ligands themselves. It is the purpose of this article to fill the corresponding gap in the photochemical literature and to summarize our current knowledge of such reactions and of their mechanisms and possible applications. [L,M(ABC)] % [L,M(BC)] + A [L,M(ABC)] % [L,M(BCA)] Anqew C'hem. In[ Ed. Engl. 2711988) 789-796 0 VCH VerlagsgesellschaJi mbH. D-6940 Wernherm, 1988 0570-0833/88/0606-0789 S 02 5 0 / 0 789
Gut bekannt und mehrfach diskutiert sind drei Typen photochemischer Reaktionen vonKoordinationsverbindungen: Redox-, Substitutions-und Isomerisierungsreaktionen. Weniger bekannt, obwohl genugend oft vorkommend, sind photochemische Reaktionen, die vorwiegend an den Liganden lokalisiert sind. Der vorliegende Aufsatz sol1 diese Lucke in der photochemischen Literatur schlie13en und unser heutiges Wissen uber solche Keaktionen, ihre Mechanismen und Anwendungsmoglichkeiten zusammenfassen.
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