TY  - JOUR
A1  - Bock, Hans
A1  - Sievert, Mark
A1  - Schödel, Holger
A1  - Kleine, Markus
T1  - Wechselwirkungen in Kristallen, 88 [1 - 3]. Donator/Akzeptor - Komplexe von Alkylbenzolen, Pyren oder Perylen mit Tetrahalogen-p-benzochinonen: Strukturen und Eigenschaften
T1  - Interactions in crystals, 88 [1 - 3]. Donor/acceptor complexes of alkylbenzenes, pyrene or perylene and tetrahalogen-p-benzoquinones: structures and properties
T2  - Zeitschrift für Naturforschung, B
N2  - The following mixed-stack donor/acceptor complexes {D · · · A }∞ have been crystallized and their structures determined: { 1 ,2,4,5-tetramethylbenzene · · · tetrabromo-p -benzoquinone}∞ , {hexamethylbenzene · · · tetrabromo-p-benzoquinone}∞ , { ( 1 ,2 ,4,5-tetramethyl-benzene)2 · · · tetrachloro -p -benzoquinone}∞ , {pyrene · · · tetrafluoro-p-benzoquinone}∞ , {pyrene · · · tetrabromo-p-benzoquinone}∞ and {perylene · · · tetrabromo-p-benzoquinone}∞ . They exhibit an interesting lattice packing, especially the 2:1 tripeldecker sandwich of tetrachloro-p-benzoquinone, which crystallizes in a herringbone pattern. Their interplanar distances are around 340 pm, i. e. two van der Waals π radii. None of them , however, exhibits in neither the donor nor the acceptor components significant structural changes due to complex formation. Their colours range from orange-red to black in the crystal and to green in H2CCl2 solution. Their long-wavelengths charge transfer absorption maxim a correspond to a lowering in excitation energy of up to 2 eV relative to that of the components. The different charge transfer in the ground and excited states of the donor/acceptor complexes investigated is further discussed referring to data such as cyclovoltammetric reduction potentials as w ell as to results from semiempirical calculations based on the crystal structure data determined and including configuration interaction.
KW  - Mixed-S tack Donor/Acceptor Complexes
KW  - Crystal Structure
KW  - U V /V IS Spectra
KW  - Semiempirical Calculations
Y1  - 2014
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/81185
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-811850
SN  - 1865-7117
SN  - 0932-0776
VL  - 51.1996
IS  - 11
SP  - 1521
EP  - 1537
PB  - Verlag der Zeitschrift für Naturforschung
CY  - Tübingen
ER  -