Distorted germylene: A distorted seven‐membered N‐heterocyclic germylene, which has a germanium center of relatively high Lewis acidity, reacts with benzaldehyde to give (2+1+1) or (2+2+1) cycloadducts. The type of cycloadduct produced in the reaction is dependent on the ratio of substrates used. It is considered that the reactions involve stereoselective 1,3‐dipolar cycloadditions of an in situ generated carbonyl germaylide.
Verzerrtes Germylen: Ein verzerrtes siebengliedriges N‐heterocyclisches Germylen mit einem relativ stark Lewis‐sauren Germaniumzentrum reagiert mit Benzaldehyd zu (2+1+1)‐ oder (2+2+1)‐Cycloaddukten. Dabei bestimmt das Mengenverhältnis der Substrate, welche Art von Cycloaddukt entsteht. Man nimmt an, dass an den Reaktionen stereoselektive 1,3‐dipolare Cycloadditionen eines in situ erzeugten Carbonyl‐Germa‐Ylids beteiligt sind.
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