Conclusions
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1.
A study had been made of hydrogen exchange in 1,1′-di-tert-butylcobalticinium borofluoride, and 1,1′,3,3′ -tetra-tert-butylcobalticinium borofluoride, in MeOD+DMSO+MeOK. The hydrogen atoms of the cyclopentadienyl (Cp) ring of the tert-butyl-substituted cobalticinium salts retain their ability to exchange for deuterium, the situation here differing from that met in the methyl-substituted cobalticinium salts.
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2.
The rates of isotopic hydrogen exchange have been used to estimate the acidity of the Cp-ring C-H bonds in 1,1′-di-tert-butylcobalticinium tetrafluoroborate and in 1,1′,3,3′-tetra-tert-bu1ylcobalticinium tetrafluoroborate.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 67–70, January, 1978.
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Nesmeyanov, A.N., Kursanov, D.N., Bykova, E.V. et al. Isotopic hydrogen exchange with tert-butyl-substituted cobalticinium salts. Russ Chem Bull 27, 57–60 (1978). https://doi.org/10.1007/BF01153208
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DOI: https://doi.org/10.1007/BF01153208