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Seit Gombergs Entdeckung von Triphenylmethyl im Jahr 1900 wurde die Dimerisierung des Moleküls ausführlich untersucht. Die tatsächliche Struktur des Dimers (das α,p‐Addukt) wurde jedoch erst 1968 aufgeklärt, da es vorher fälschlicherweise für Hexaphenylethan (das α,α‐Addukt) gehalten worden war. Sterisch gehinderte, aber stabile α,α‐Addukte sind inzwischen mit neuen Methoden zugänglich. In ihrer Zuschrift...
Upon reduction of a 1H‐cyclobuta[de]naphthalene‐4,5‐diylbis(diarylmethylium) species, a new CC bond is formed between the Cα and Cortho atoms of the two chromophores, which presents an unprecedented coupling pattern for the dimerization of two trityl units. By attaching an annulated cyclobutane ring at the opposite peri position of the naphthalene core, the distance between the Cα carbon atoms was...
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