Results 11 to 20 of about 1,328 (139)
CHIMIA, 1989 N,N'-Bis(2,5-di-tert-butylphenyl)-3,4:9,10-perylenebis(dicarboximide) (1a), N,N'-bis(1-hexylheptyl)-3,4:9,10-perylenebis(dicarboximide) (1b), and 1,1,3,3,6,6,8,8- octamethyl-1,2,3,6,7,8-hexahydro-5,10-dioxaindeno[5,4-e]indene-4,9-dione (2) have been ...
Josef Salbeck +4 more
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CHIMIA, 1988 The design of efficient organic electron acceptors requires oligomeric and polymeric hydrocarbons in which separate redox-active units are connected in a sterically variable fashion.
Manfred Wagner +2 more
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CHIMIA, 1987 C14H14 tetracyclic tetraene 1 and its benzoanellated derivatives 2, 3 are sought as versatile intermediates. Preparatively useful syntheses have been worked out for the key intermediates (diketones 10-12).
Johann P. Melder +3 more
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CHIMIA, 1985 The quinoide and hydroquinoide aceneazulene compounds 2 und 3, respectively, have been investigated as to their electron transfer properties by cyclovoltammetry: Reversible trianion formation is observed in the case of the 12-dicyanomethylidene ...
Johann Bindl, Josef Salbeck, Jörg Daub
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GMS Medizinische Informatik, Biometrie und EpidemiologieBackground: Practice management systems (PMS) are essential for the documentation and billing of outpatient medical and psychotherapeutic services.
Müller, Doreen +2 more
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CHIMIA, 1985 (PPh4)2[Fe4S4Br4] which contains according to the X-ray structure analysis a non-compressed {Fe4S4}2⊕ core can be obtained in a simple procedure in high yield by bubbling H2S through a solution of FeBr3 in dimethyl formamide/methanol in the presence of (
Achim Müller +2 more
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CHIMIA, 1988 The two compounds Na6[VIV18O42H9(VVO4)]∙21 H2O (1) and (NH4)8[VlV12VV6O42(SO4)]∙25 H2O (2) have been prepared and characterized by X-ray structure analysis. Both anions exhibit a large difference in the electron population of their V18O42 cluster shells.
Achim Müller +3 more
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CHIMIA, 1986 Simple preparation procedures for the compounds [(C2H5)4N][ReS4] and [(C6H5)4P][ReS9]0.7[ReOS8]0.3 – the latter containing new simple polysulfido complexes – together with their structural data and the 185/187Re-NMR spectra of [ReO4]⊖ and [ReS4]⊖ are ...
Achim Müller +4 more
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The Significance of the HPLC Time Scale: An Example of Interconvertible Enantiomers
CHIMIA, 1989 Racemization during high-performance liquid chromatography (HPLC) on optically active sorbents generates peak coalescence/decoalescence phenomena. It is shown that they may serve useful in proving the interconvertibility of enantiomers or, in other ...
Albrecht Mannschreck +2 more
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CHIMIA, 1988 Substituents at C-12 distinctively influence the electron-transfer behavior of dibenzoheptafulvenes 1 as demonstrated by cyclovoltammetry and by chemical oxidation.
Reinhard Hahn, Josef Salbeck, Jörg Daub
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