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第 17 章

芳香族化合物

芳香族化合物:概要
芳香族化合物:概要
In general, the term ‘aromatic’ indicates a pleasant smell or fragrance from fresh flowers, freshly prepared coffee, etc. In the early history ...
一置換基を有する芳香族化合物の命名法
一置換基を有する芳香族化合物の命名法
Benzene is the simplest aromatic hydrocarbon or arene. The IUPAC names for simple monosubstituted benzene derivatives are derived by adding the ...
複数の置換基を持つ芳香族化合物の命名法
複数の置換基を持つ芳香族化合物の命名法
When more than one substituent is present on the benzene ring, the IUPAC nomenclature depends on the number of substituents present. For disubstituted ...
ベンゼンの構造:ケクレモデル
ベンゼンの構造:ケクレモデル
In 1865, August Kekule suggested the structure of benzene according to the structural theory of organic chemistry based on the three ...
ベンゼンの構造:分子軌道モデル
ベンゼンの構造:分子軌道モデル
According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, ...
芳香族性とヒュッケル4<em>n</em> + 2則の基準
芳香族性とヒュッケル4n + 2則の基準
Like benzene, cyclobutadiene and cyclooctatetraene are cyclic compounds with alternate single and double bonds. However, their chemical behavior differs ...
ヒュッケルの π MO のルール図: フロスト サークル
ヒュッケルの π MO のルール図: フロスト サークル
The Frost circle or the inscribed polygon method is a graphical method for determining the relative energies of π molecular orbitals (MOs) for ...
さまざまな共役系のフロストサークル
さまざまな共役系のフロストサークル
The inscribed polygon method is consistent with Hückel’s 4n + 2 rule and helps to learn whether the given cyclic compound is aromatic or not. ...
芳香族炭化水素陰イオン:構造概要
芳香族炭化水素陰イオン:構造概要
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene ...
芳香族炭化水素カチオン:構造概要
芳香族炭化水素カチオン:構造概要
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. ...
5員複素環芳香族化合物:概要
5員複素環芳香族化合物:概要
Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. ...
芳香族化合物のNMR分光法
芳香族化合物のNMR分光法
Aromatic compounds can be identified or analyzed using proton NMR and carbon‐13 NMR. Typically, aromatic hydrogens or hydrogens directly bonded to ...
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