2 article(s) from Zipse, Hendrik
Basicity and nucleophilicity switching of the 4-(N,N-dimethylamino)pyridine “record player” molecul...
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Synthesis of 4-N,N-dimethylamino record player molecule 1 by Suzuki reaction between Ni-porphyrin p...
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Composition of the different states of porphyrin 1 (1 mM) in the PSS at 530 nm and 435 nm, determin...
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a) UV–vis cuvette with a solution of porphyrin 1 (13.1 µM in THF) and the corresponding UV–vis spec...
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General scheme of the nitroaldol (Henry) reaction that was used to investigate photoswitchable cata...
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DMAP (2), azopyridine trans-4, record player trans- and cis-1 and Ni-porphyrin 8 were used in kinet...
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Conversion of 4-nitrobenzaldehyde (6) in the Henry reaction with nitroethane (5) as a function of t...
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Beilstein J. Org. Chem. 2020, 16, 2119–2126, doi:10.3762/bjoc.16.179
Reactions for the methyl cation affinity (MCA) of a neutral Lewis base (1a), an anionic Lewis base ...
MCA values of monosubstituted amines of general formula Me2N(CH2)nH (n = 1–7, in kJ/mol).
Systematic dependence of MCA.
Trends in amine MCA values.
Eclipsing interactions in the best conformation of N+Me(iPr)3 (16Me) (left), and the corresponding ...
General expression for the chain-length dependence of MCA values.
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MCA values of monosubstituted phosphanes of general formula Me2P(CH2)nH (n = 1–8, in kJ/mol).
MCA values of monosubstituted phosphanes of general formula PMe2(CH(CH2)n+1) (n = 1–8, in kJ/mol).
The MCA values of n-butyldiphenylphosphane (102) and its (αα-/ββ-/γγ-) dimethylated analogues.
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MCA values of phosphanes Me2P–NR2 with cyclic and acyclic amine substituents.
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MCA values of phosphanes PMe2R connected to α,α- and β,β-position of nitrogen containing cyclic sub...
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Reactions for the benzhydryl cation affinity (BHCA) of a Lewis base (5a) and pyridine (5b).
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Comparison of BHCA values (kJ/mol) and nucleophilicity parameters N for sterically unbiased pyridin...
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Reactions for the trityl cation affinity (THCA) of a Lewis base (6a) and pyridine (6b).
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Comparison of MCA, BHCA, and TCA values of selected Lewis bases.
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Correlations of BHCA/TCA values with the respective MCA data for sterically unbiased systems (exclu...
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Scheme for the angle d(RXRR) measurements.
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Reactions for the Mosher's cation affinity (MOSCA) of a Lewis base.
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Reactions for the acetyl cation affinity (ACA) of a Lewis base (9a) and pyridine (9b).
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Structure of the acetylated pyridine 380 (380Ac).
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Reaction for the Michael-acceptor affinity (MAA) of a Lewis base.
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Inverted reaction free energies for the addition of N- and P-based Lewis bases to three different M...
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Correlation between MCA values and affinity values towards three different Michael acceptors.
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(a) General definition for a methyl cation transfer reaction between Lewis bases LB1 and LB2, and (...
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The energetically best conformations of Pn-Bu3 (120_1, top) and (120_2, bottom).
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Relative order of the conformations 120_1 to 120_7 depending on the level of theory.
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The structure of the energetically best conformations of 120Me.
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Beilstein J. Org. Chem. 2012, 8, 1406–1442, doi:10.3762/bjoc.8.163
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