Results 11 to 20 of about 618 (167)
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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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
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Norcorrole as a Delocalized, Antiaromatic System [PDF]
Scientific Reports, 2019 AbstractNickel norcorrole provides an unusual example of a molecule that is strongly antiaromatic according to the magnetic criterion, but which exhibits, according to high-quality DFT calculations, a symmetric, delocalized structure with no difference in bond length between adjacent Cmeso-Cα bonds.
Jeanet Conradie +2 more
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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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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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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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Norcorrole: Aromaticity and Antiaromaticity in Contest [PDF]
Organic Letters, 2020 Magnetic shielding studies demonstrate that nickel norcorrole (NiNc) and norcorrole (H2Nc) provide unusual examples of stable molecules with high antagonistic levels of antiaromaticity and aromaticity: Both incorporate an antiaromatic "core", a 14-membered cyclic conjugated subsystem with 16 π electrons, surrounded by an aromatic "halo" in the form of ...
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Cyclobutadiene: The Antiaromatic Paradigm? [PDF]
ChemInform, 2006 AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
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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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