10.1002/anie.202004320
Angewandte Chemie International Edition
RESEARCH ARTICLE
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The work was funded by the Deutsche Forschungsgemeinschaft
(DFG, German Research Foundation) under Germany’s
Excellence Strategy (EXC 2008/1-390540038). G.W. thanks the
China Scholarship Council for a postdoctoral fellowship (2019–
2020). All theoretical calculations were performed at the High-
Performance Computing Center (HPCC) of Nanjing University.
M.O. is indebted to the Einstein Foundation (Berlin) for an
endowed professorship.
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Keywords: cycloaddition • density functional calculations • ring
expansion • silylium ions • small ring systems
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