7 article(s) from Herges, Rainer
- Full Research Paper
- Published 20 Mar 2019
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Figure 1: (a) Isomerization of parent diazocine 1. Distances of carbon atoms para to the ethylene bridge were...
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Figure 2: Synthesized target diazocines 4–7 for applications in responsive materials.
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Scheme 1: Key reactions in diazocine synthesis.
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Scheme 2: Syntheses of the functionalized diazocines 4–7. Reaction conditions: i) Isobutylene, sulfuric acid,...
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Figure 3: UV–vis spectra of 3,3’-diaminodiazocine 2 (left), 3,3’-di(aminomethyl)diazocine 6a (center), and 3,...
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- Full Research Paper
- Published 07 Nov 2018
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Figure 1: Cis–trans isomerization of mono-functionalized S-diazocines 1–5.
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Scheme 1: Reaction conditions: i) MeCN, AIBN, NBS; ii) NaBH4, THF; #commercially available iii) BH3·THF compl...
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Figure 2: UV spectra of the S-diazocine 4 in cis (black) and in trans (red) configuration after irradiation w...
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Figure 3: Left: crystal structure of the iodo-functionalized S-diazocine 3. Right: crystal structure of the u...
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- Letter
- Published 12 Dec 2017
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Scheme 1: Diels–Alder reaction of isobenzofuran and formation of a benzene ring in the cycloadduct.
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Scheme 2: Different approaches for the synthesis of IBF (1).
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Scheme 3: Reaction of in situ prepared IBF (1) with DMAD (9).
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- Full Research Paper
- Published 15 Aug 2013
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Figure 1: Formal, topological approach to derive coarctate reactions from pericyclic reactions; p, q: number ...
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Figure 2: Stereochemistry of coarctate reactions derived from a Hückel (top) and a Möbius band (bottom). The ...
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Scheme 1: Coarctate fragmentation of the spiroozonide derived from methylenecyclopropane.
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Scheme 2: Photochemically and thermally allowed coarctate fragmentations of spiroketals.
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Scheme 3: Precursors used in this study.
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Figure 3: Difference infrared spectrum, showing the changes in the IR spectrum after photolysis (λexc = 254 n...
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Figure 4: Infrared spectrum obtained upon FVP of 1 at T = 1143 K and trapping the pyrolysate in solid argon a...
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Figure 5: Infrared spectrum obtained upon FVP of 2 at T = 963 K and trapping the pyrolysate in solid argon at ...
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Figure 6: Infrared spectrum obtained upon FVP of 3 at T = 1043 K and trapping the pyrolysate in solid argon a...
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Scheme 4: Possible fragmentation pathways in the FVP of 1.
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Scheme 5: Possible fragmentation pathways in the FVP of 2.
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Scheme 6: Possible fragmentation pathways in the FVP of 3.
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- Full Research Paper
- Published 02 Jan 2013
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Figure 1: Configurations and conformations of 5,6-dihydrodibenzo[c,g][1,2]diazocine (1), and DFT (B3LYP/6-31G...
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Scheme 1: Synthesis of 3,3’-diamino-EBAB 4 and its acetamide derivative 5.
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Figure 2: Crystal structures of the cis isomers of 3,3’-diamino-EBAB 4 and its acetamide derivative 5. The at...
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Figure 3: UV–vis spectra of the diazocine derivatives 3,3’-diamino-EBAB 4 and its bisamide derivative 5 in ac...
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Figure 4: Absorbances of solutions of 4 and 5 in acetonitrile at 405 nm (red) and 485 nm (blue) in the corres...
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Figure 5: DFT-calculated structure (B3LYP/6-31+G**) of a complex of 5 with ethylenediamine as a conceivable m...
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- Full Research Paper
- Published 12 Jan 2012
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Figure 1: Simplified free energy scheme for driving an endergonic condensation (elimination/addition of water...
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Figure 2: Binding motive of a vanadate zinc benzylcyclene complex (left) as suggested by the results of DFT c...
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Figure 3: 51V NMR titration at pH 9.5 ([V]t = 1.5 mM, [1]t = 0 to 7.5 mM (0 to 5 equiv), 100 mM CHES). [V]t a...
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Figure 4: Speciation of vanadium in a solution containing 1.5 mM Na3VO4, 100 mM CHES (pH = 9.5) and a Zn-benz...
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Figure 5: 51V EXSY NMR spectrum (tmix = 1 ms) of a solution containing 1.5 mM Na3VO4, 3 mM Zn-benzylcyclene a...
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- Full Research Paper
- Published 29 Mar 2010
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Scheme 1: Synthesis of 1 and 3. (a) Pyridazine, toluene, reflux, 20 h; (b) NaI, DMF, 65 °C, 15 h.
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Scheme 2: Synthesis of 2 and 4. (a) NaI, DMF, 65 °C, 24 h; (b) AgSbF6, THF.
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Figure 1: ORTEP drawing of the crystal structures: a) 2 and b) 3. For additional perspective representations ...
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Figure 2: a) ORTEP drawing of the crystal structure of 4. Ag+ and Ag+, describe the two disordered positions ...
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Scheme 3: Synthesis of 5 and 6. (a) Toluene, 90 °C, 15 h.
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Figure 3: ORTEP drawing of the crystal structures: a) 5b and b) 6. For additional perspective representations...
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