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Updated: May 25, 2026

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
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N@C60-ポルフィリン: 2つの根元中心の二酸化物

Guoquan Liu1, Andrei N Khlobystov, Georgios Charalambidis

  • 1Department of Materials, Oxford University, Oxford OX1 3PH, United Kingdom.

Journal of the American Chemical Society
|January 14, 2012
PubMed
まとめ

研究者らは,内定性窒素フルレンとポルフィリン二酸化物を合成した. 彼らは,スピン状態をオン・オフに切り替えるための新しいメカニズムを実証し,分子スピントロニクスの可能性を示しました.

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Radicals: Electronic Structure and Geometry01:07

Radicals: Electronic Structure and Geometry

This lesson delves into the geometry of a radical, which is influenced by the electronic structure of the molecule. The principle is similar to that of a lone pair, where the unpaired electron influences the geometry at the radical center.
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Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group with both...
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Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
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