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Updated: May 3, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

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ハリド−π相互作用の溶液中の熱力学的特徴付けは,モデルシステムとして"二壁"アリル拡張カリックス[4]ピロルを用いて行われた

Louis Adriaenssens1, Guzmán Gil-Ramírez, Antonio Frontera

  • 1Institute of Chemical Research of Catalonia (ICIQ) , Avgda Països Catalans 16, 43007 Tarragona, Spain.

Journal of the American Chemical Society
|February 6, 2014
PubMed
まとめ

この研究は,ハリド-π相互作用が主に有機溶媒におけるエンタルピー駆動であることを明らかにしています. 溶解効果は,アセトニトリルなどの極性溶媒における結合熱力学に大きな影響を与える.

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Electrophilic Addition to Alkynes: Halogenation

Introduction
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
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Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
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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.
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