4 article(s) from Wegner, Hermann A
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- Published 30 Sep 2019
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Figure 1: Methane, fluoromethane, and difluoromethane in Lewis representation (top, left to right), in ball a...
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Figure 2: Multiple allocations of molecules to PI classes. Molecules that can be allocated to a group on the ...
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Figure 3: Left: benzene from two different angles, PI code of benzene: PI = 1/2D/C3H3/cX1-1-2-3-X2-X3-X1/h1-3...
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Figure 4: The atom carbon by Patrick Borchers (left) and Christoph Kern (right).
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Figure 5: Artistic interpretation by Jette Flügge of the atoms hydrogen, carbon, nitrogen, oxygen, and fluori...
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Figure 6: Hangings of methane (CH4), fluoromethane (CH3F), and difluoromethane (CH2F2) (from left to right) b...
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- Full Research Paper
- Published 29 May 2018
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Scheme 1: Half-lives for the thermal Z→E isomerization of all-meta-alkyl-substituted azobenzenes 1–3 in DMSO ...
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Scheme 2: Isomerization of N-substituted Z-azobenzenes (a). Rotational equilibrium of (Z)-4 allowing intramol...
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Figure 1: a) Optimized geometry of open conformer (R,S)-4 c0. b) NCI plot of the most stable conformer of (R,S...
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- Published 13 Mar 2018
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Scheme 1: Bidentate bisborane Lewis acids.
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Scheme 2: Complexation reaction of 5,10-dimethyl-5,10-dihydroboranthrene (A) with Lewis bases analyzed by NMR...
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Figure 1: Time-dependent 1H NMR spectra of the air-exposed complex B.
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Scheme 3: Synthetic procedures of bisboranes A and B.
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Figure 2: ORTEP drawing (50% probability) of complex B.
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Figure 3: UV–vis spectrum of complex B was measured in CHCl3 and compared with pyridazine and bisborane A (co...
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- Published 13 Jun 2012
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Figure 1: para-Substituted bisazobiphenyls 1 investigated by Hecht (R1, R2 = H, Me, R3 = t-Bu) and by Woolley...
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Figure 2: Synthetic strategy for the assembly of meta-substituted oligo-azobiphenyls 2.
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Scheme 1: Synthesis of 2-nitro-4-tert-butyl-6-bromobenzoic acid (6).
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Scheme 2: Preparation of nitroso derivative 10.
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Scheme 3: Assembly of oligomer 2 by Suzuki cross-coupling and site-selective Mills reaction.
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Figure 3: Isomerization studies of compound 13 (a), 15 (b), 16 (c) and 2 (d) (Irradiation at 356 nm in CHCl3)....
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Figure 4: Comparison of the absorption as well as the photostationary state of compounds 13, 15, 16, 2.
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Figure 5: Four different isomers of 2.
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