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Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles
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Cinchoninium L-tartrate tetrahydrate

R Puliti1, C A Mattia, A De Fazio

  • 1Istituto Chimica Biomolecolare CNR, Via Campi Flegrei 34, Ex Olivetti Fabbricato 70, I-80078 Pozzuoli, Napoli, Italy. puliti@chemistry.unina.it

Acta Crystallographica. Section C, Crystal Structure Communications
|December 12, 2001
PubMed

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Aromatic Hydrocarbon Cations: Structural Overview01:18

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Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group with both...