Conclusions
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1.
Dimerization and codimerization of 2- and 7-substituted norbornadienes in the presence of low-valent iron complexes gives new mono- and 5(6), 11-disubstituted exo-trans-exopentacyclo [8.2.1.14,702,90.3,8]tetradeca-5,11-dienes in high yields.
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2.
According to photoelectronic spectral data, introduction of substituents into the 2- and 7-positions of norbornadiene does not result in any significant changes in the interaction energies of the double bonds.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimlcheskaya, No. 4, pp. 902–907, April, 1982.
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Rafikov, S.R., Dzhemilev, U.M., Khusnutdinov, R.I. et al. [2π+2π] Catalytic homo- and codimerization of substituted norbornadienes. Russ Chem Bull 31, 795–799 (1982). https://doi.org/10.1007/BF00950022
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DOI: https://doi.org/10.1007/BF00950022