Results 11 to 20 of about 2,216 (186)
Stacked antiaromatic porphyrins [PDF]
Nature Communications, 2016 It has been proposed that stacking antiaromatic molecules can build three-dimensional aromaticity, but this claim has lacked experimental validation.
Ryo Nozawa +10 more
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The principle underlying antiaromaticity
, 2019 Aromaticity is one of the most widely used chemical concepts. Current definitions are purely phenomenological and relate symmetry, reactive stability and the occurence of molecular diamagnetic response currents.
Berger, Raphael J. F., Viel, Alexandre
core +2 more sources
An antiaromatic-walled nanospace [PDF]
Nature, 2019 Over the past few decades, several molecular cages, hosts and nanoporous materials enclosing nanometre-sized cavities have been reported1-5, including coordination-driven nanocages6. Such nanocages have found widespread use in molecular recognition, separation, stabilization and the promotion of unusual chemical reactions, among other applications3-10.
Yamashina, Masahiro +5 more
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ChemistryOpen, 2023 The construction of 1,2‐position‐connected azulene oligomers was achieved. In the crystal packing structure of the terazulene, two molecules of (Ra)‐ and (Sa)‐configurations formed a pair.
Prof. Dr. Takahiro Tsuchiya +2 more
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On the antiaromatic–aromatic–antiaromatic transition of the stacked cyclobutadiene dimer
Physical Chemistry Chemical Physics, 2023 We have studied the changes in the aromatic nature of two cyclobutadiene (C4H4) molecules on decreasing the intermolecular distance and approaching the cubane structure in a face-to-face fashion.
Mesías Orozco-Ic, Dage Sundholm
openaire +3 more sources
How do the Hückel and Baird Rules Fade away in Annulenes?
Molecules, 2020 Two of the most popular rules to characterize the aromaticity of molecules are those due to Hückel and Baird, which govern the aromaticity of singlet and triplet states.
Irene Casademont-Reig +3 more
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Molecules, 2020 Density functional calculations and up to five different basis sets have been applied to the exploration of the structural, enthalpy and free energy changes upon conversion of the azepine to the corresponding N-oxide.
René Fournier +5 more
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The application of aromaticity and antiaromaticity to reaction mechanisms
Fundamental Research, 2023 Aromaticity, in general, can promote a given reaction by stabilizing a transition state or a product via a mobility of π electrons in a cyclic structure.
Qin Zhu +7 more
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Molecules, 2023 We utilized a cycloaromatization reaction driven by relief of excited state antiaromaticity to photouncage aldehydes and ketones. We developed several synthetic routes towards the synthesis of photocaged carbonyls as allylically substituted 3-(2 ...
Adam Campbell +2 more
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Relief of excited-state antiaromaticity enables the smallest red emitter
Nature Communications, 2021 Commonly, large π-conjugated systems facilitate low-energy electronic transitions. Here, the authors demonstrate that the relief of excited-state antiaromaticity of the benzene core leads to large Stokes shifts, and allows the construction of emitters ...
Heechan Kim +5 more
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