Journalartikel
Autorenliste: Molski, MJ; Mollenhauer, D; Gohr, S; Paulus, B; Khanfar, MA; Shorafa, H; Strauss, SH; Seppelt, K
Jahr der Veröffentlichung: 2012
Seiten: 6644-6654
Zeitschrift: Chemistry - A European Journal
Bandnummer: 18
Heftnummer: 21
ISSN: 0947-6539
DOI Link: https://doi.org/10.1002/chem.201102960
Verlag: Wiley
The halogenated benzenes C6HF5, 2,4,6‐C6H3F3, 2,3,5,6‐C6H2F4, C6F6, C6Cl6, C6Br6, and C6I6
Abstract:
were converted into their corresponding cation radicals by using
various strong oxidants. The cation‐radical salts were isolated and
characterized by electron paramagnetic resonance (EPR) spectroscopy and
by single‐crystal X‐ray diffraction. The thermal stability of the cation
radicals increased with decreasing hydrogen content. As expected, the
cation radicals [C6HF5]+ and 2,3,5,6‐[C6H2F4]+ had structures with the same geometry as C6HF5 and 2,3,5,6‐[C6H2F4]. In contrast, the cation radicals [C6F6]+, [C6Cl6]+, and possibly also [C6Br6]+ exhibited Jahn–Teller‐distorted geometries in the crystalline state. In the case of C6F6+Sb2F11−, two low‐symmetry geometries were observed in the same crystal. Interestingly, the structures of the cation radicals 2,4,6‐[C6H3F3]+ and C6I6+
did not exhibit Jahn–Teller distortions. DFT calculations showed that
the explanation for the lack of distortion of these cations from the D3h or D6h symmetry of the neutral benzene precursor was different for 2,4,6‐[C6H3F3]+ than for [C6I6]+.
Zitierstile
Harvard-Zitierstil: Molski, M., Mollenhauer, D., Gohr, S., Paulus, B., Khanfar, M., Shorafa, H., et al. (2012) Halogenated Benzene Cation Radicals, Chemistry - A European Journal, 18(21), pp. 6644-6654. https://doi.org/10.1002/chem.201102960
APA-Zitierstil: Molski, M., Mollenhauer, D., Gohr, S., Paulus, B., Khanfar, M., Shorafa, H., Strauss, S., & Seppelt, K. (2012). Halogenated Benzene Cation Radicals. Chemistry - A European Journal. 18(21), 6644-6654. https://doi.org/10.1002/chem.201102960