S. Taubmann et al. / Journal of Organometallic Chemistry 694 (2009) 2005–2019
2019
under stirring, a ratio metal (complex) to Al between 1:50 and
:200 was used. The activation of the complexes was accompanied
by a color change.
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1
(
[
(
4.4. Homogeneous dehydrogenation of cyclooctane
[
[
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[
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4
00 °C. After 16 h, the autoclave was cooled on air and the gas as
[
well as the solution were analysed by GC.
[
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7
[
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First the absorbable amount of the liquid of the support has to
be determined. For this purpose, one gram of the support was
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soon as there remained a small puddle of visible liquid, the pores
of the support are filled. This point is called ‘‘incipient wetness”.
The required amount of solvent can be calculated via the weight
difference. The amount of the liquid depends on the solvent and
on the support.
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[
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[
[
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amount of toluene and this solution was added slowly to the sup-
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Applying this method, the catalysts 76–91 were prepared.
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[
[
[
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[
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4.6. Heterogeneous dehydrogenation of cyclooctane
1
041.
The CH activation experiments were carried out in a stainless
steel fixed bed reactor. The standard temperature was 400 °C, the
reaction time was 5 h at normal pressure. The WHSV was between
.1 and 2.7. The samples were taken hourly and identified by GC.
[
[
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1
[
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Acknowledgment
139.
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We thank ConocoPhillips, Bartlesville, USA, for the financial
support of the project.
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[
[
[
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