(Fonds voor Wetenschappelijk Onderzoek-Vlaanderen) and
techniques. Argon was first dried by passing through a P
2 5
O
(
lar weight distribution of the polymers were determined by gel
Aldrich 97%) column. The molecular weights and the molecu-
to the Research funds of Ghent University for financial
support.
ꢀ
permeation chromatography (CHCl
Class-VP system equipped with a series of 3 PL gel columns
3
, 25 C) using a Shimadzu
3
4
5
˚
(
PSS SDV 30 cm, Ø ¼ 8 mm, 10 , 10 , 10 A) and the calibra-
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˚
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Ruthenium complex (0.03 mmol) was dissolved in 1 ml toluene
and subsequently added through a septum to the solution of
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1
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1
1
1
7
8
1
ꢀ
ꢀ
bath at 85 C for the methacrylates and 110 C for styrene.
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6
39.
2
2
1
2
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4
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2
2
2
during 30 minutes, turbidity of AgCl was detected and the
monomer and initiator were added. After the polymerisation
the same procedure was followed as with the neutral catalysts.
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ml of distilled water was added to the reaction mixture. The
ethoxy Fischer carbene complexes (7–10) were also synthesised
in situ by adding 10 equivalents of ethyl vinyl ether to the cat-
alyst solution and subsequently stirring for 30 min at room
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5
6
7
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AgBF to the ethoxy carbene solution.
4
2
9
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3
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Acknowledgements
T.O. is indebted to the Research funds of Ghent University for
a research grant. F.V. is indebted to the FWO-Flanders
33 S. Hamasaki, M. Kamigaito and M. Sawamoto, Macromolecules,
2002, 35, 2934.
2
62
New J. Chem., 2003, 27, 257–262