In the January/February issue of the magazine American Scientist, Chemistry Nobel Laureate Roald Hoffmann took exception to scientists applying the concept of aromaticity beyond organic molecules to ...

Scientists have achieved the first real-time visualization of how 'excited-state aromaticity' emerges within just hundreds of femtoseconds and then triggers a molecule to change from bent to planar ...

Aromaticity is one of chemistry’s oldest concepts to describe the behavior of molecules. Chemists created it 150 years ago to help visualize and explain the bonding, structure, and reactivity of ...

Note all C-C bonds are 1.5 bonds due to resonance. This rule determines if a molecule is aromatic or not. In order for a molecule to be aromatic: 1. It must have 4n+2 π electrons in a circle (2, 6, 10 ...

The field of aromaticity has grown five-fold in the last two decades as revealed by Merino et al. in their Perspective "Aromaticity: Quo Vadis" where they ask where ...

The concept of aromaticity underpins much of modern organic chemistry, describing the unusual stability and reactivity of cyclic molecules whose π-electrons are delocalised over a planar framework.

A [3+2]-dipolar cycloaddition of 2,6-disubstituted aryloxyallenes and 4-nitrobenzenesulfonyl azide (NsN 3) followed by a Claisen rearrangement driven by synchronized aromaticity affords novel ...

Researchers have been trying to find a full definition of aromaticity for almost two centuries, and yet keep discovering new types. Katrina Krämer asks when chemists will get to the bottom of this ...

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[2 4]Paracyclophanetetraene is a classic example of a macrocyclic hydrocarbon that becomes globally aromatic on reduction to the di-anion, and switches to globally anti-aromatic in the tetra-anion.

Researchers in the UK and US have obtained crystallographic evidence for global aromaticity and anti-aromaticity in reduced cyclophane hydrocarbons. When [2 4]paracyclophanetetraene, a hoop of four ...

In 1862, a chemist nodded off in front of a fire and began to dream. August Kekulé had been pondering the most pressing question in his field at the time: what was the chemical structure of a curious ...