organic chemistry - Is the cyclopropenyl anion antiaromatic ...
2016年5月20日 · According to my book, a compound is antiaromatic if it is cyclic, planar, and possesses a fully conjugated system of p-orbitals with 4n 4 n π-electrons. However, I have also been told that the cyclopropenyl anion is neither aromatic nor antiaromatic. How is this so?
Why is the cyclopropenium ion aromatic? - Chemistry Stack …
2018年1月2日 · A Huckel model calculation indicates that cyclopropenyl cation has roughly as much stabilization as benzene, but it's distributed over three instead of six carbon atoms. Thus aromaticity is especially powerful in a cyclopropenyl cation ring.
Accessing elusive σ -type cyclopropenium cation equivalents
2024年5月23日 · Here we introduce electrophilic cyclopropenyl-gold(III) species as equivalents of σ-type CPCs, which can then react with terminal alkynes and vinylboronic acids.
Cyclopropenium functionalization - Nature Chemistry
2024年5月23日 · Now, writing in Nature Chemistry, Jérôme Waser and co-workers introduce a σ -type cyclopropenyl synthon by utilizing a class of hypervalent iodine reagents coined cyclopropenyl benziodoxole...
Gilding σ -type cyclopropenium cations - Nature
2024年6月26日 · The employment of cyclopropenyl benziodoxoles as synthetic equivalents of σ-type cyclopropenium cations is an elegant solution to address the stability issue of the latter in organic chemistry ...
Cyclopropenyl anion: an energetically nonaromatic ion - PubMed
2013年7月19日 · A central idea in organic chemistry for the past 50 years is that cyclopropenyl anion is antiaromatic. A correlation between cycloalkene acidities and allylic bond angles reveals that energetically this is not case, cyclopropenyl anion is nonaromatic.
Structure of cyclopropene, cyclopropenyl cation, and cyclopropenyl …
Structure of cyclopropene, cyclopropenyl cation, and cyclopropenyl anion. Source publication. Predicting the hybridization state: a comparative study between conventional and innovative...
Cyclopropenyl radical | C3H3 | CID 141453 - PubChem
2005年8月8日 · Cyclopropenyl radical | C3H3 | CID 141453 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
Theoretical study of the cyclopropenyl radical | Journal of the ...
Thermochemical Assessment of the Aromatic and Antiaromatic Characters of the Cyclopropenyl Cation, Cyclopropenyl Anion, and Cyclopropenyl Radical: A High-Level Computational Study. The Journal of Physical Chemistry 1996, 100 (45) , 17801-17806. DOI: 10.1021/jp961882k.
The structures of half-opened cyclopropyl cations. Theoretical ...
Thermochemical Assessment of the Aromatic and Antiaromatic Characters of the Cyclopropenyl Cation, Cyclopropenyl Anion, and Cyclopropenyl Radical: A High-Level Computational Study. The Journal of Physical Chemistry 1996 , 100 (45) , 17801-17806.