TY  - JOUR
A1  - Bock, Hans
A1  - Kaim, Wolfgang
A1  - Kira, Mitsuo
A1  - Réné, Louis
A1  - Viehe, Heinz-Günther
T1  - Radikalionen, 61 [1, 2]. Dialkylamino-substituierte Acetylene und Allene: Ionisation, Oxidation und AlCl3-katalysierte Wasserstoffübertragung
T1  - Radical Ions, 61 [1, 2]. Dialkylamino-substituted acetylenes and allenes: ionisation, oxidation and AlCl3-catalyzed hydrogen transfer
T2  - Zeitschrift für Naturforschung, B
N2  - The photoelectron (PE) spectra of bis(dialkylamino) acetylenes R2N-C≡C-NR2 and of tetrakis(dialkylamino) allenes (R2N)2C=C=C(NR2)2 with R = CH3, C2H5 exhibit characteristic ionization patterns which are assigned to π radical cation states of the two molecular halves twisted against each other. The low first ionization potentials between 7.0 eV and 7.7 eV stimu­lated attempts to oxidize using AlCl3 in H2CCl2 or D2CCl2. The hyperfine structured ESR spectra observed can be unequivocally assigned to the ethylene radical cations R2N-HC=CH -NR2˙⊕ which are formed from the obviously non-persistent species R2N-C≡C-NR2˙⊕ via a hydrogen transfer. During the oxidation of the dialkylamino-substituted allenes no paramagnetic intermedi­ates could be detected, presumably due to a rapid dimerisation of the allene radical cation (R2N)2C=C=C(NR2)2˙⊕.
KW  - Dialkylamino Substituted π Systems
KW  - Radical Cations
KW  - ESR Spectra
KW  - PE Spectra
Y1  - 2014
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/71980
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-719803
SN  - 1865-7117
SN  - 0932-0776
VL  - 39.1984
IS  - 6
SP  - 763
EP  - 770
PB  - Verlag der Zeitschrift für Naturforschung
CY  - Tübingen
ER  -