74552-21-9Relevant academic research and scientific papers
Permethylmetallocene, II. Decamethylcobaltocen: Synthese und Umwandlung in methylierte (Aren)(cyclopentadienyl)cobalt-Kationen
Koelle, Ulrich,Khouzami, Fouad
, p. 2929 - 2937 (2007/10/02)
Decamethylcobaltocene (1b) is obtained from dibromo(1,2-dimethoxyethane)cobalt and pentamethylcyclopentadienyllithium. 1b shows enhanced reactivity in oxidative addition reactions with electrophiles RX.This reaction, when performed with chloroiodoalkanes, leads to exo-chloroalkyl complexes, which undergo a solvolytic ring expansion reaction, again more smoothly than the analogous derivatives of cobaltocene (1a), to form permethylated (cyclohexadienyl)(cyclopentadienyl)cobalt cations +.The latter are oxidized with nitric acid to yield for the first time (arene)(cyclopentadienyl)cobalt dications, 2+, methylated in both ligand rings.
