Synthesis of magnesium dicyclopentadienide catalyzed by titanium and vanadium derivatives

Synthesis of magnesium dicyclopentadienide from metal and cyclopentadiene in THF is effectively catalyzed by the derivatives of vanadium and titanium. The kinetics of the synthesis, as well as thermodynamic parameters of reagents adsorption on the magnesium surface, have been determined. The process...

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Bibliographic Details
Published in:Applied organometallic chemistry 2001-03, Vol.15 (3), p.161-168
Main Authors: Maslennikov, Stanislav V., Ignatyev, Roman A., Piskounov, Alexandr V., Spirina, Irina V.
Format: Article
Language:English
Subjects:
catalytic
cyclopentadiene
dicyclopentadienide
hydrogenation
kinetics
magnesium
titanocene
vanadocene
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Summary:Synthesis of magnesium dicyclopentadienide from metal and cyclopentadiene in THF is effectively catalyzed by the derivatives of vanadium and titanium. The kinetics of the synthesis, as well as thermodynamic parameters of reagents adsorption on the magnesium surface, have been determined. The process catalyzed by titanium derivatives is accompanied by the quantitative hydrogenation of cyclopentadiene to cyclopentene whereas the catalysis by vanadium derivatives leads to hydrogen gas evolution. A number of reaction intermediates including Cp2TiCl, Cp2TiH2MgCl, Cp2Ti(cyclo‐C5H7) and Cp2V, were identified by the electron spin resonance method. The equilibrium constants, enthalpies and entropies of adsorption of metal halides on the magnesium surface were calculated. Copyright © 2001 John Wiley & Sons, Ltd.
ISSN:0268-2605
1099-0739
DOI:10.1002/aoc.115