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Off with a bang: The thermally stable high-energy 1 was prepared in a more efficient synthetic route. An unexpected ring scission of the tetraazapentalene T-shaped isomer 1 (distinctive nitrogen atom arrangement indicated in blue) occurs through an intramolecular electron rearrangement activated by highly-reactive ψ-dinitroso substituents of intermediate 2 to give 3.
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Huynh et al. (2005) studied this question.
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