Research output: Contribution to journal › Article › peer-review
Electrochemical reduction, radical anions, and dehalogenation of fluorinated/chlorinated 2,1,3-benzothia/selenadiazoles. / Shundrin, Leonid A.; Irtegova, Irina G.; Avrorov, Pavel A. et al.
In: Arkivoc, Vol. 2017, No. 3, 25.06.2017, p. 166-180.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Electrochemical reduction, radical anions, and dehalogenation of fluorinated/chlorinated 2,1,3-benzothia/selenadiazoles
AU - Shundrin, Leonid A.
AU - Irtegova, Irina G.
AU - Avrorov, Pavel A.
AU - Mikhailovskaya, Tatiana F.
AU - Makarov, Arkady G.
AU - Makarov, Alexander Yu
AU - Zibarev, Andrey V.
PY - 2017/6/25
Y1 - 2017/6/25
N2 - At the first stage of electrochemical reduction in DMF, fluorinated/chlorinated 2,1,3-benzothia/selenadiazoles formed long-lived radical anions characterized by EPR and DFT. Gas-phase electron affinities (EA1) from DFT correlated well with the first-peak potentials separately for S and Se derivatives, and the latter were found to be better electron acceptors than the former in contrast to the atomic EA1 and Allen electronegativity. At the second stage, chalcogen-and halogen-dependent dehalogenation proceeded: non-hydrodefluorination of selenadiazoles through their n-electron activation (n ≥ 2), and hydrodechlorination of thia/selenadiazoles through H+ addition to their dianions. These differ from dehalogenation of related (aza) aromatics (e.g. benzenes, naphthalenes, quinoxalines).
AB - At the first stage of electrochemical reduction in DMF, fluorinated/chlorinated 2,1,3-benzothia/selenadiazoles formed long-lived radical anions characterized by EPR and DFT. Gas-phase electron affinities (EA1) from DFT correlated well with the first-peak potentials separately for S and Se derivatives, and the latter were found to be better electron acceptors than the former in contrast to the atomic EA1 and Allen electronegativity. At the second stage, chalcogen-and halogen-dependent dehalogenation proceeded: non-hydrodefluorination of selenadiazoles through their n-electron activation (n ≥ 2), and hydrodechlorination of thia/selenadiazoles through H+ addition to their dianions. These differ from dehalogenation of related (aza) aromatics (e.g. benzenes, naphthalenes, quinoxalines).
KW - 2,1,3-benzoselenadiazoles
KW - 2,1,3-Benzothiadiazoles
KW - Chlorinated
KW - Cyclic voltammetry
KW - Dehalogenation
KW - DFT
KW - EPR
KW - Fluorinated
KW - Radical anions
UR - http://www.scopus.com/inward/record.url?scp=85021672416&partnerID=8YFLogxK
U2 - 10.3998/ark.5550190.p010.116
DO - 10.3998/ark.5550190.p010.116
M3 - Article
AN - SCOPUS:85021672416
VL - 2017
SP - 166
EP - 180
JO - Arkivoc
JF - Arkivoc
SN - 1551-7004
IS - 3
ER -
ID: 10097176