Results 1 to 10 of about 5,976 (269)

Concealed antiaromaticity [version 1; peer review: 1 approved, 2 approved with reservations] [PDF]

Open Research Europe, 2023
The literature reports numerous molecules claimed to be antiaromatic because of a formal 4n π-electron system. However, this neglects the actual local aromaticity of the molecules, which often feature multiple subunits with [4n+2] π-electrons besides the
Florian Glöcklhofer
doaj   +4 more sources

Antiaromaticity in molecular assemblies and materials. [PDF]

Chem Sci
Antiaromatic rings are infamously unstable and difficult to work with but they possess unusual electronic properties that make them interesting for fundamental and applied research.
Lavendomme R, Yamashina M.
europepmc   +6 more sources

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, Shuwen Chen, Dandan Chen, Lu Lin, Kui Xiao, Liang Zhao, Miquel Solà, Jun Zhu   +7 more
doaj   +4 more sources

Pyridine‐Fused Bis(azacorrole)s: Easily Accessible NIR III Absorbing Cation Radicals and Biradicaloids of Antiaromatic Ground State [PDF]

Advanced Science
A family of pyridine‐fused bis(porphyrinoids) is obtained, including constitutionally isomeric bis(azacorrole)s, azacorrole‐oxacorrole, as well as azacorrole‐norcorrole heterodimers by two distinct synthetic approaches.
Sha Li, Shaowei Zhang, Xiaofang Li, Oskar Smaga, Kinga Szydełko, Miłosz Pawlicki, Piotr J. Chmielewski   +6 more
doaj   +3 more sources

Metallo-Anti-aromatic Al4Na4 and Al4Na3- compounds: A theoretical investigation [PDF]

, 2003
We propose a theoretical investigation in this paper to understand the bonding and structural properties of neutral Al4Na4 and anion Al4Na3- clusters.
Kanhere, Dilip. G., Pal, Sourav, Shetty, Sharan   +2 more
core   +2 more sources

Photocyclization of Alkenes and Arenes: Penetrating Through Aromatic Armor with the Help of Excited State Antiaromaticity [PDF]

Chemistry
This review focuses on photocyclization reactions involving alkenes and arenes. Photochemistry opens up synthetic opportunities difficult for thermal methods, using light as a versatile tool to convert stable ground-state molecules into their reactive ...
Nikolas R. Dos Santos, Judy I. Wu, Igor V. Alabugin   +2 more
doaj   +2 more sources

Theoretical monitoring of aromaticity induction from noble gases to Borole structure [PDF]

Scientific Reports
Density functional theory (DFT) calculations were conducted to examine the inductive charge transferring from noble gas (Ng) atoms to borole structure. The calculations indicate that all noble gas atoms especially heavier ones can induce charge to the B ...
Ayda Atri, Morteza Rouhani, Zohreh Mirjafary   +2 more
doaj   +2 more sources

Reactivity umpolung of the cycloheptatriene core in hexa(methoxycarbonyl)cycloheptatriene [PDF]

Beilstein Journal of Organic Chemistry
A reactivity umpolung approach for the derivatization of cycloheptatrienes was extended to hexa(methoxycarbonyl)cycloheptatriene, which forms the corresponding anion reactive towards electrophiles.
Dmitry N. Platonov, Alexander Yu. Belyy, Rinat F. Salikov, Kirill S. Erokhin, Yury V. Tomilov   +4 more
doaj   +2 more sources

Reversible formation of tetraphenylpentalene, a room temperature stable antiaromatic hydrocarbon. [PDF]

Chem Sci
Sanderson HJ, Helbig A, Kociok-Köhn G, Helten H, Hintermair U.   +4 more
europepmc   +3 more sources

Structures and electron affinity energies of polycyclic quinones

Heliyon, 2022
In this study, quinoid structures, semiquinone radical structures, and electron affinity energies (EAEs) of many polycyclic quinones containing heteroatoms (O, B, and F) or heterocycles (pyrrole, imidazole, and pyrazine) were calculated.
Xucheng Wang, Yao Cheng, Yaofeng Yuan, Yongfan Zhang, Wenfeng Wang   +4 more
doaj   +1 more source