Complexation and activation of diazenes and diazo compounds by transition metals.

Autor: Davison, Alan, Dewar, Michael J. S., Hafner, Klaus, eilbronner, Edgar, Hofmann, Ulrich, Lehn, Jean-Marie, Niedenzu, Kurt, Schäfer, Klaus, Wittig, Georg, Boschke, Friedrich L., Albini, Angelo, Kisch, Horst
Zdroj: Theoretical Inorganic Chemistry II; 1976, p105-145, 41p
Abstrakt: It is evident from the results presented above that the cis-(−N=N−) bond has powerful coordinating properties towards low valent transition metals. Due to the unique electronic structure of the diazeno group, many different modes of interaction have been observed and it seems promising that this ability of the N=N function may be utilized in catalytic processes. Since diazene itself is a proposed intermediate in biological nitrogen-fixation, the observed modes of coordination are of some relevance to this problem. The results obtained from the cycloaddition reactions are of general importance for the investigation of the factors determining photochemical or thermal reactions of coordinated ligands. The ability of iron carbonyls to activate the diazeno group towards attack by unsaturated molecules like alkynes, offers a convenient synthesis of novel organic heterocycles. Together with the recently reported conversion of coordinated dinitrogen into diazeno and diazenato complexes4), these reactions may be key steps in the incorporation of N2 into organic compounds. [ABSTRACT FROM AUTHOR]
Databáze: Supplemental Index