Übergangsmetallkomplexe von Diazenen, XXIV [1]. Komplexierung und N=N-Spaltung von Diazenen durch Dicarbonylbis(cyclopentadienyl)titan / Transition Metal Complexes of Diazenes, XXIV [1] Complexation and N = N-Cleavage of Diazenes by Dicarbonylbis(cyclopentadienyl)titanium release_yectz7sohfduvaoa3xwuvox6q4

Abstract

Reaction of Cp<jats:sub>2</jats:sub>Ti(CO)<jats:sub>2</jats:sub>, Cp=h<jats:sup>5</jats:sup>-C<jats:sub>5</jats:sub>H<jats:sub>5</jats:sub>, with the 1,2-diazenes ROCN = NCOR (R = EtO (1a), tert-BuO (1b), p-MeC<jats:sub>6</jats:sub>H<jats:sub>4</jats:sub>O (1c), p-MeC<jats:sub>6</jats:sub>H<jats:sub>4</jats:sub> (1d)) in the molar ratio of 1:1 yiclds five- membered metallacycles 2 by formal 1,4-addition of 1 to the Cp<jats:sub>2</jats:sub>Ti fragment. When a two-fold excess of Cp<jats:sub>2</jats:sub>Ti(CO)<jats:sub>2</jats:sub> is employed, the initially formed 2 reacts further by N = N-cleavage to give Cp<jats:sub>2</jats:sub>Ti(NCO)(OR), Cp<jats:sub>2</jats:sub>Ti(NCO)<jats:sub>2</jats:sub> and Cp<jats:sub>2</jats:sub>Ti(OR)<jats:sub>2</jats:sub> resp., in the case of 1a-1c. The bis(p-methyl- benzoyI)diazene (1d) does not afford analogous cleavage products. Dimethyl- and pentamethy- lenediazirine also react by cleavage of the N = N-bond to afford Cp<jats:sub>2</jats:sub>Ti(NCO)(N=CR<jats:sub>2</jats:sub>).
In application/xml+jats format

Archived Files and Locations