Скачать или смотреть Molecular Art: Rearrangement of a homoaromatic system,

Cyclobutadiene is considered an anti-aromatic compound. After protonation a homoaromatic
molecule is formed, which can undergo a rearrangement yielding a methylcyclopropyl cation.
The final product has aromatic character and is more stable compared to the starting material.
Quantum chemical calculations using DFT suggest a two step mechanism, the barrier for the
second step is significant (appr. 40 kcal/mol, PBE0/def2-SVP, DSD-PBEB95 def2-SVP D3BJ RIJONX).
The mechanism was calculated using ORCA (Version 6) using density functional theory (PBE0/def2-SVP).

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References:

MOPAC v22.0.4
Digital Object Identifier (DOI): 10.5281/zenodo.6511958

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Neese, F. Software update: the ORCA program system – Version 6.0 Wiley Interdiscip. Rev.: Comput. Mol. Sci., 2025, 15, 2, e70019 (DOI: 10.1002/wcms.70019)

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povray 3.7
POV-Ray 3.7 (GNU Affero General Public License, version 3 or later)

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Octave
John W. Eaton, David Bateman, Søren Hauberg, Rik Wehbring (2023).
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URL https://www.gnu.org/software/octave/doc/v8...

iMovie: Copyright © 2024 Apple Inc.

inspirations taken from: https://www.f-lohmueller.de/pov_tut/pov__g...

Music
https://pixabay.com/de/music/