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Updated: Sep 9, 2025

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
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Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI

Published on: November 22, 2016

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ディボロンアクチニド化合物Pa2B2の芳香性と安定性を再検討する

Chengxiang Ding1, Lina Ruiz2, Alejandro Vásquez-Espinal3

  • 1Institute of Atomic and Molecular Physics, Jilin University Changchun 130023 China sudip@jlu.edu.cn.

Chemical science
|August 29, 2025
PubMed
まとめ

この研究は,Pa2B2クラスタの芳香性主張に異議を唱え,その安定した形はD2h対称ではなく四面体である. 相対論的計算では,純環電流がないことが示され,芳香性の欠如を示し,重元素群の厳密な分析の必要性を強調しています.

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In aromatic compounds, such as benzene, the circulation of (4n + 2) π-electrons sets up a diamagnetic or diatropic ring current around the perimeter of the molecule. This current induces a magnetic field that opposes the external field inside the ring and reinforces it on the outside. The protons in benzene are deshielded and exhibit high chemical shifts in the range 6.5–8.5 ppm. The shielding effect at the center of the ring is evident in complex aromatic molecules, such as...
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