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10 LIVRES EN ANGLAIS EN RAPPORT AVEC «DIATROPIC»
Découvrez l'usage de
diatropic dans la sélection bibliographique suivante. Des livres en rapport avec
diatropic et de courts extraits de ceux-ci pour replacer dans son contexte son utilisation littéraire.
1
Handbook of Plant and Crop Physiology, Third Edition
Irradiation of the stolon apical zone with FR did not affect its diatropic growth
pattern. Light treatment with R after FR induced a negative phototropic response.
So, it was shown that irradiation with R or white light induced a negative
phototropic ...
Mohammad Pessarakli,
2014
In the first transition a σ- type (a 1/ MO is involved in the excitation inducing a σ-
diatropic ring current, while in the second transition a -type (a002/ MO is involved
inducing a -diatropic ring current. In the Œc-Be32 cluster the σ-diatropic ring ...
3
Aromatic and Heteroatomic Chemistry
(273) R1 = R2 = Me, Bu\ or Ph R' = Ph, R2 = Me R^Bu', R2 = Ph (275) structures
are not equivalent, as in the series (276) — (278), then the tetrahydro- derivative (
278) is the most strongly diatropic.208 The structures shown for (276) and (277) ...
C. W. Bird, G. W. H. Cheeseman,
1977
4
Fragments of Fullerenes and Carbon Nanotubes: Designed ...
The 1H NMR spectrum of neutral corannulene consists of one singlet at a low
field (d1⁄47.93ppm in THF-d8),33 indicating a diatropic ring current about the
perimeter. On charging to a dianion, the ring current becomes paratropic,
indicated by ...
Marina A. Petrukhina, Lawrence T. Scott,
2011
5
Intermolecular Forces and Clusters I
In the particular case of planar carbocycles in geometries with the highest
symmetry consistent with their electronic shell closure, it has been shown that the
symmetry-based selection rules for diatropic and paratropic ring currents can be
...
6
Handbook of Porphyrin Science: With Applications to ...
NMR Spectroscopy The 1H NMR spectrum of 9 reveals a diatropic ring current by
displaying strongly shielded signals due to the inner β- and NH-protons, and
strongly deshielded signals due to the outer β-protons. However, the 1H NMR ...
7
Aromaticity and Metal Clusters
On the other hand, the chief contribution to paratropic ring current arises from the
S-l,-2(e') — > LUMO, +l(e') excitations, which correspond to 7?z-allowed
transitions. In the c-U3 (7 A") cluster, despite the contribution to diatropic ring
current ...
Pratim Kumar Chattaraj,
2010
8
March's Advanced Organic Chemistry: Reactions, Mechanisms, ...
molecule undergoes aromatic substitution276 and is diatropic.280 The outer
protons are found at 8.14–8.67 d, while the CH3 protons are at À4.25 d. Other
nonplanar aromatic dihydropyrenes are known.281 Annulenes 111 and 112 are
also ...
Michael B. Smith, Jerry March,
2007
9
Coordination Chemistry Research Progress
Ligand-Effects. on. the. Stability,. Conformational. Preference. and. Diatropic.
Response. of. 3-Membered. Hydrocopper. Rings. Constantinos A. Tsipis' ,
Christos E. Kefalidis and Nicholas D. Charistos Laboratory of Applied Quantum
Chemistry, ...
Kevin S. Verley, Todd W. Cartere,
2008
10
Biological Pigments—Advances in Research and Application: ...
The pyrazole-containing porphyrin analogues are crossconjugated and exhibit
only a small degree of diatropic character. The internal CH resonances were
observed between 5.27 and 5.87 ppm, while the external meso-protons fell into a
...