Results 1 to 10 of about 19,114 (261)

Aromaticity rules

open access: yesNature Chemistry, 2022
The following organizations are thanked for financial support: the Ministerio de Ciencia e Innovación (MICINN, project number PID2020-113711GB-I00) and the Generalitat de Catalunya (project number 2017SGR0039)
Solà i Puig, Miquel
openaire   +4 more sources

Global Aromaticity at the Nanoscale [PDF]

open access: yesNature Chemistry, 2019
Aromaticity can be defined by the ability of a molecule to sustain a ring current when placed in a magnetic field. Hückel's rule states that molecular rings with [4n + 2] π-electrons are aromatic, with an induced magnetization that opposes the external field inside the ring, whereas those with 4n π-electrons are antiaromatic, with the opposite ...
Michel Rickhaus   +8 more
core   +10 more sources

Supramolecular aromaticity

open access: yesJournal of Molecular Structure, 2014
We report experimental and theoretical evidences for supramolecular aromaticity as a new concept to be widely used in researches about molecular crystals. CSD survey regarding frequently encountered resonance-assisted H-bonds (RAHBs) in formic acid, formamide, formimidamide, formic acid-formamide, and formamide-formimidamide dimers shows that ...
Karabiyik, Hande   +2 more
openaire   +4 more sources

Aromatic chloroosmacyclopentatrienes

open access: yesNational Science Review, 2022
ABSTRACT Aromatic metallacycles are of considerable current interest. Reported aromatic metallacycles are mainly those with carbon, nitrogen, oxygen and sulfur. In this work, we report the synthesis and characterization of aromatic chloroosmacyclopentatrienes, which represent the first structurally confirmed metallaaromatic with a ...
Zhenwei Chu   +7 more
openaire   +3 more sources

Visualisation of chemical shielding tensors (VIST) to elucidate aromaticity and antiaromaticity [PDF]

open access: yes, 2021
Aromaticity is a central concept in chemistry, pervading areas from biochemistry to materials science. Recently, chemists also started to exploit intricate phenomena such as the interplay of local and global (anti)aromaticity or aromaticity in non‐planar
Florian, Glöcklhofer   +5 more
core   +1 more source

Aromaticity: quo vadis

open access: yes, 2023
Aromaticity is one of the most deeply rooted concepts in chemistry. But why, if two-thirds of existing compounds can be classified as aromatic, is there no consensus on what aromaticity is? σ−, π−, δ−, spherical, Möbius, or all-metal aromaticity… why are
Lazzeretti, Paolo   +35 more
core   +1 more source

Aromaticity-Enhanced pH-Responsive Electrochemiluminescence of Cyclopentadienols

open access: yes, 2022
Due to significantly tackling the problems of aggregation-caused quenching and water insolubility, aggregation-induced emission electrochemiluminescence (AIE-ECL) has emerged as a research highlight in aqueous detection and sensing. Herein, we reported a
Yanhong Xu   +11 more
core   +1 more source

Hydrogenated polycyclic aromatic hydrocarbons: isomerism and aromaticity

open access: yesPhysical Chemistry Chemical Physics, 2020
A simple model based on adjacency matrices is introduced to study the stability of hydrogenated polycyclic aromatic hydrocarbons. Aromaticity governs their relative stability having the most stable isomers the higher number of non-hydrogenated rings.
Paula Pla   +3 more
openaire   +3 more sources

Quantifying the electronic dimension of global aromaticity in macrocycles

open access: yes, 2023
Characteristic magnetic shielding patterns are commonly associated with ring currents, and therefore aromaticity, in large molecular structures. However, the relationship between ring currents and aromaticity is controversial, and this problem is not ...
David, Bradley   +2 more
core   +1 more source

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