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CIDNP of 13 C and 1 H nuclei in the reactions of cyclohexadienone carbenes
Author(s) -
Nikiforov G. A.,
Markaryan Sh. A.,
Plekhanova L. G.,
Sviridov B. D.,
Rykov S. V.,
Ershov V. V.,
Buchachenko A. L.,
Pehk T.,
Saluvere T.,
Lippmaa E.
Publication year - 1973
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270050707
Subject(s) - intersystem crossing , cidnp , carbene , chemistry , photochemistry , halogen , singlet state , decomposition , thermal decomposition , exothermic reaction , diazo , medicinal chemistry , polarization (electrochemistry) , physics , catalysis , organic chemistry , atomic physics , excited state , alkyl
Thermal decomposition of 4‐diazo‐2,6‐di‐ tert ‐butyl‐2, 5‐cyclohexadien‐1‐one in perhalogenated solvents has been investigated. The decomposition reaction proceeds via a carbene intermediate first to a singlet and then to an effectively triplet free encounter radical pair formed in a halogen abstraction reaction. The polarisation of the stable reaction product is determined by competing processes in the primary cage, intersystem crossing and escape from the cage.