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Synthesis of magnesium dicyclopentadienide catalyzed by titanium and vanadium derivatives
Author(s) -
Maslennikov Stanislav V.,
Ignatyev Roman A.,
Piskounov Alexandr V.,
Spirina Irina V.
Publication year - 2001
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.115
Subject(s) - chemistry , magnesium , cyclopentadiene , catalysis , titanium , vanadium , cyclopentene , inorganic chemistry , adsorption , equilibrium constant , reagent , metal , organic chemistry
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 Cp 2 TiCl, Cp 2 TiH 2 MgCl, Cp 2 Ti(cyclo‐C 5 H 7 ) and Cp 2 V, 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.