Green Chemistry
Communication
a
Table 4
Entry
1
H
2
generation from ethylene glycol and D-sorbitol
Substrate Solvent
μmol, ppm
V (1 h)
TOF (1 h)
64 459
V (2 h)
TOF (2 h)
59 253
Diglyme (50.0 mL)
0.34, 0.38
535.5
984.5
2
Diglyme (8.0 mL)
H O (2.0 mL)
2
1.30, 15.9
32.8
1025
49.0
765
a
Reaction conditions: reactions were performed at 125 °C with 1.50 M KOH, volumes (mL) were measured by gas burette and blank volumes
−
1
were removed. TOFs (h ) were reported on the average of 2 reactions with an error margin of 6%.
M. Nielsen, H.-J. Drexler, W. Baumann, H. Junge and
Acknowledgements
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We thank Dr Elisabetta Alberico for providing catalysts 3 and
4
, A.+E. Fischer Chemie for providing industrial glycerol. Y. L.
and M. N. thank the Alexander von Humboldt Foundation for
financial support.
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2
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