Conclusions
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1.
The triplet states of bipolar spiro-σ-complexes of tropolone derivatives possessing electron-donor and electron-acceptor properties were recorded.
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2.
The reaction of the triplet states with strong electron donors in a nonpolar medium leads to the formation of triplet exciplexes.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1898–1900, August, 1987.
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Levin, P.P., Kuz'min, V.A., Prokof'ev, A.I. et al. Properties of the triplet states of bipolar spiro-σ-complexes. Russ Chem Bull 36, 1760–1762 (1987). https://doi.org/10.1007/BF00960158
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DOI: https://doi.org/10.1007/BF00960158