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Acknowledgements
We thank Prof. H.-J. Himmel for his constant support, the DFG
(GR5007/2-1) and FCI for financial support. The federal state
Baden-Würtemberg is acknowledged for providing computational
resources (BWFor/BWUni). Till Kalkuhl is acknowledged for
experimental support.
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Keywords: Lewis superacid • Germanium • Lewis acid catalysis
• water stable • soft Lewis acid
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