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into the aqueous reaction mixture. It is filtered through a short silica plug and ana-
tempting to speculate that part of the effect lysed by gas chromatography.
originates from changes in the water/2-pro-
Acknowledgements
panol solvent structure with changing com-
position. For example, the viscosity of wa-
ter/2-propanol mixtures changes markedly
and shows a pronounced maximum at 61%
v/v 2-propanol concentration due to the re-
arrangement of the intra- and intermolec-
ular H-bond network[25] and propanol may
substantially effect the aldehyde–water
H-bonding interactions. However, since
sufficient information is not available, at
this stage the possible connection between
such solvent structural changes and the
kinetics of the transfer hydrogenation of
trans-cinnamaldehyde remains elusive.
The research was supported by the EU and
co-financed by the European Social Fund under
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